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    —— (6E)-2-benzyl-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H24N4O4S
    (6E)-2-benzyl-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-butyl-6-[[5-(2,5-dichlorophenyl)furan-2-yl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C20H16Cl2N4O2S
    (6E)-2-butyl-6-[[5-(2,5-dichlorophenyl)furan-2-yl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[(5-chloro-3-methyl-1-phenylpyrazol-4-yl)methylidene]-5-imino-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C23H17ClN6OS
    (6E)-6-[(5-chloro-3-methyl-1-phenylpyrazol-4-yl)methylidene]-5-imino-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[1-[2-(4-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H27N5O3S
    (6E)-5-imino-6-[[1-[2-(4-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-butyl-6-[(2,5-dimethyl-1-phenylpyrrol-3-yl)methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C22H23N5OS
    (6E)-2-butyl-6-[(2,5-dimethyl-1-phenylpyrrol-3-yl)methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-5-imino-6-[[3-methoxy-4-(2-phenoxyethoxy)phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H24N4O4S
    (6E)-2-benzyl-5-imino-6-[[3-methoxy-4-(2-phenoxyethoxy)phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-butyl-5-imino-6-[[5-(4-methylphenyl)sulfanylfuran-2-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C21H20N4O2S2
    (6E)-2-butyl-5-imino-6-[[5-(4-methylphenyl)sulfanylfuran-2-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-chloro-4-[2-(2,6-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C25H25ClN4O4S
    (6E)-6-[[3-chloro-4-[2-(2,6-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[2-(2-chlorophenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H23ClN4O3S
    (6E)-6-[[4-[2-(2-chlorophenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-6-[[3-ethoxy-4-[(4-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H23FN4O3S
    (6E)-2-benzyl-6-[[3-ethoxy-4-[(4-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[2-(2,6-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(phenoxymethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C29H26N4O4S
    (6E)-6-[[4-[2-(2,6-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(phenoxymethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-butyl-5-imino-6-[[1-[2-(3-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H27N5O3S
    (6E)-2-butyl-5-imino-6-[[1-[2-(3-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C25H26N4O4S
    (6E)-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-6-[[4-[2-(3,4-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H28N4O4S
    (6E)-2-benzyl-6-[[4-[2-(3,4-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-2-(2-methylpropyl)-6-[(4-phenylmethoxyphenyl)methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C23H22N4O2S
    (6E)-5-imino-2-(2-methylpropyl)-6-[(4-phenylmethoxyphenyl)methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-chloro-5-ethoxy-4-[2-(4-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H29ClN4O4S
    (6E)-6-[[3-chloro-5-ethoxy-4-[2-(4-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[2-[2-[(2S)-butan-2-yl]phenoxy]ethoxy]phenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H28N4O3S
    (6E)-6-[[4-[2-[2-[(2S)-butan-2-yl]phenoxy]ethoxy]phenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-6-[[3-chloro-5-methoxy-4-(2-phenoxyethoxy)phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H23ClN4O4S
    (6E)-2-benzyl-6-[[3-chloro-5-methoxy-4-(2-phenoxyethoxy)phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-chloro-4-[2-(2,5-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H27ClN4O4S
    (6E)-6-[[3-chloro-4-[2-(2,5-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-chloro-4-[2-(3,5-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H27ClN4O4S
    (6E)-6-[[3-chloro-4-[2-(3,5-dimethylphenoxy)ethoxy]-5-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[3-[2-(3-methylphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C25H26N4O3S
    (6E)-5-imino-6-[[3-[2-(3-methylphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-6-[[4-[2-(2,4-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H28N4O4S
    (6E)-2-benzyl-6-[[4-[2-(2,4-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-[2-(2,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H28N4O3S
    (6E)-6-[[3-[2-(2,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-7-methoxy-5-(4-methylphenyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one —— C24H22N2O3
    6-[(5S,10bR)-7-methoxy-5-(4-methylphenyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one
    —— (6E)-5-imino-2-(2-methylphenyl)-6-[[5-(4-methylphenyl)sulfanylfuran-2-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H18N4O2S2
    (6E)-5-imino-2-(2-methylphenyl)-6-[[5-(4-methylphenyl)sulfanylfuran-2-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[(4-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C23H21FN4O2S
    (6E)-6-[[4-[(4-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[3-chloro-4-[(2-fluorophenyl)methoxy]-5-methoxyphenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H22ClFN4O3S
    (6E)-6-[[3-chloro-4-[(2-fluorophenyl)methoxy]-5-methoxyphenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6Z)-6-[[3-[2-(3,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H24N4O3S
    (6Z)-6-[[3-[2-(3,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-2-ethyl-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[2-[2-[(2R)-butan-2-yl]phenoxy]ethoxy]-3-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H32N4O4S
    (6E)-6-[[4-[2-[2-[(2R)-butan-2-yl]phenoxy]ethoxy]-3-methoxyphenyl]methylidene]-5-imino-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bS)-7-methoxy-5-(2-methylsulfanylethyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one —— C21H24N2O3S
    6-[(5S,10bS)-7-methoxy-5-(2-methylsulfanylethyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one
    —— (6E)-6-[[3-chloro-5-ethoxy-4-[2-(2-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H29ClN4O4S
    (6E)-6-[[3-chloro-5-ethoxy-4-[2-(2-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[1-[2-(2-methoxy-4-prop-2-enylphenoxy)ethyl]indol-3-yl]methylidene]-2-methyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H25N5O3S
    (6E)-5-imino-6-[[1-[2-(2-methoxy-4-prop-2-enylphenoxy)ethyl]indol-3-yl]methylidene]-2-methyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-[[4-[2-(3,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(phenoxymethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C29H26N4O4S
    (6E)-6-[[4-[2-(3,5-dimethylphenoxy)ethoxy]phenyl]methylidene]-5-imino-2-(phenoxymethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-6-[[4-[2-(2,6-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H28N4O4S
    (6E)-2-benzyl-6-[[4-[2-(2,6-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[3-methoxy-4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C29H26N4O5S
    (6E)-5-imino-6-[[3-methoxy-4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-7-methoxy-5-propan-2-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one —— C20H22N2O3
    6-[(5S,10bR)-7-methoxy-5-propan-2-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one
    —— (6E)-2-butyl-6-[[3-ethoxy-4-[2-(4-methoxyphenoxy)ethoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H30N4O5S
    (6E)-2-butyl-6-[[3-ethoxy-4-[2-(4-methoxyphenoxy)ethoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-5-imino-6-[[4-[2-(3-methoxyphenoxy)ethoxy]phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H24N4O4S
    (6E)-2-benzyl-5-imino-6-[[4-[2-(3-methoxyphenoxy)ethoxy]phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-benzyl-5-imino-6-[[1-[2-(2-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H25N5O3S
    (6E)-2-benzyl-5-imino-6-[[1-[2-(2-methoxyphenoxy)ethyl]indol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-2-butyl-6-[[3-ethoxy-4-[(2-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C25H25FN4O3S
    (6E)-2-butyl-6-[[3-ethoxy-4-[(2-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-9-bromo-5-thiophen-2-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one —— C20H15BrN2O2S
    6-[(5S,10bR)-9-bromo-5-thiophen-2-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one
    —— 6-[(5S,10bS)-9-bromo-5-pyridin-4-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one —— C22H18BrN3O2
    6-[(5S,10bS)-9-bromo-5-pyridin-4-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one
    —— (6E)-2-benzyl-6-[[3-ethoxy-4-[2-(3-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H28N4O4S
    (6E)-2-benzyl-6-[[3-ethoxy-4-[2-(3-methylphenoxy)ethoxy]phenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-5-(4-hydroxyphenyl)-7-methoxy-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one —— C24H22N2O4
    6-[(5S,10bR)-5-(4-hydroxyphenyl)-7-methoxy-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one
    —— (6E)-2-benzyl-6-[[4-[2-(3,5-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C30H28N4O4S
    (6E)-2-benzyl-6-[[4-[2-(3,5-dimethylphenoxy)ethoxy]-3-methoxyphenyl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-5-imino-6-[[4-[2-(4-methylphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H24N4O3S
    (6E)-5-imino-6-[[4-[2-(4-methylphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-7-methoxy-5-(3-methylphenyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one —— C24H22N2O3
    6-[(5S,10bR)-7-methoxy-5-(3-methylphenyl)-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]cyclohexa-2,4-dien-1-one
    —— (6E)-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H24N4O4S
    (6E)-5-imino-6-[[4-[2-(2-methoxyphenoxy)ethoxy]phenyl]methylidene]-2-(2-methylphenyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 6-[(5S,10bR)-5-(3-hydroxyphenyl)-7-methoxy-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one —— C24H22N2O4
    6-[(5S,10bR)-5-(3-hydroxyphenyl)-7-methoxy-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one
    —— 6-[(5S,10bS)-9-bromo-5-pyridin-3-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one —— C22H18BrN3O2
    6-[(5S,10bS)-9-bromo-5-pyridin-3-yl-1,3,5,10b-tetrahydropyrazolo[1,5-c][1,3]benzoxazin-2-ylidene]-4-methylcyclohexa-2,4-dien-1-one