摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词
中文名称 英文名称 CAS号 化学式 结构式图片
—— ethyl (2Z)-2-[(5E)-5-[(4-fluorophenyl)methylidene]-3-[2-[(3S)-3-methylpiperidin-1-yl]-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C22H25FN2O4S
ethyl (2Z)-2-[(5E)-5-[(4-fluorophenyl)methylidene]-3-[2-[(3S)-3-methylpiperidin-1-yl]-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[(5-acetyl-2-methoxyphenyl)methyl]-5-[(3,5-dimethoxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C26H27NO7S
ethyl (2Z)-2-[(5E)-3-[(5-acetyl-2-methoxyphenyl)methyl]-5-[(3,5-dimethoxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(4-methylpiperidin-1-yl)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C23H25F3N2O4S
ethyl (2Z)-2-[(5E)-3-[2-(4-methylpiperidin-1-yl)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(3-fluorophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C23H19ClFNO5S
ethyl (2E)-2-[(5Z)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(3-fluorophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-methylphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C24H22ClNO5S
ethyl (2Z)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-methylphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C21H24F2N2O5S
ethyl (2E)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-chlorophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C23H19Cl2NO5S
ethyl (2E)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-chlorophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-cyanophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C24H19ClN2O5S
ethyl (2Z)-2-[(5E)-3-[(6-chloro-4H-1,3-benzodioxin-8-yl)methyl]-5-[(4-cyanophenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(5-methylthiophen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C21H19FN2O4S2
ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(5-methylthiophen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(3-bromophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H21BrN2O5S
ethyl (2Z)-2-[(5E)-5-[(3-bromophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-(2-morpholin-4-yl-2-oxoethyl)-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H21F3N2O5S
ethyl (2Z)-2-[(5E)-3-(2-morpholin-4-yl-2-oxoethyl)-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-5-[(3-bromo-4-fluorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H20BrFN2O5S
ethyl (2E)-2-[(5Z)-5-[(3-bromo-4-fluorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(2-chloro-6-fluorophenyl)methylidene]-3-(2-morpholin-4-yl-2-oxoethyl)-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C20H20ClFN2O5S
ethyl (2Z)-2-[(5E)-5-[(2-chloro-6-fluorophenyl)methylidene]-3-(2-morpholin-4-yl-2-oxoethyl)-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2E)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C21H24F2N2O5S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate —— C18H22N2O4S2
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(3-chlorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C20H23ClN2O4S
ethyl (2Z)-2-[(5E)-5-[(3-chlorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-5-[(2,3-dichlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H20Cl2N2O5S
ethyl (2E)-2-[(5Z)-5-[(2,3-dichlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-5-[(4-bromo-2-fluorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C20H22BrFN2O4S
ethyl (2E)-2-[(5Z)-5-[(4-bromo-2-fluorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(3-chloro-5-ethoxy-4-hydroxyphenyl)methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate —— C22H20ClNO8S
ethyl (2E)-2-[(3-chloro-5-ethoxy-4-hydroxyphenyl)methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate
—— ethyl (2E)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate —— C20H17FN2O4S2
ethyl (2E)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C22H19FN2O5S
ethyl (2Z)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5E)-5-[(4-bromo-2-fluorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C20H22BrFN2O4S
ethyl (2E)-2-[(5E)-5-[(4-bromo-2-fluorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(3-methylbutoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C25H34N2O5S
ethyl (2E)-2-[(5Z)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(3-methylbutoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(2,4-dichlorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C20H22Cl2N2O4S
ethyl (2Z)-2-[(5E)-5-[(2,4-dichlorophenyl)methylidene]-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5E)-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C20H21F3N2O5S
ethyl (2E)-2-[(5E)-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C22H19FN2O5S
ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-(naphthalen-1-ylmethylidene)-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate —— C24H19NO6S
ethyl (2E)-2-(naphthalen-1-ylmethylidene)-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate
—— ethyl (2Z)-2-[(5E)-5-[(4-chlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H21ClN2O5S
ethyl (2Z)-2-[(5E)-5-[(4-chlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(5Z)-5-[(3-bromophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H21BrN2O5S
ethyl (2E)-2-[(5Z)-5-[(3-bromophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[(6-methoxynaphthalen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C25H28N2O5S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[(6-methoxynaphthalen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[(2-methylphenyl)methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate —— C21H19NO6S
ethyl (2E)-2-[(2-methylphenyl)methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate
—— ethyl (2E)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C22H19FN2O5S
ethyl (2E)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(3-hydroxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[(4-phenylphenyl)methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C26H28N2O4S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[(4-phenylphenyl)methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C20H21F3N2O5S
ethyl (2Z)-2-[(5E)-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-5-[[4-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(3-methylbutoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C25H34N2O5S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[4-(3-methylbutoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2E)-2-[[5-(2-chlorophenyl)furan-2-yl]methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate —— C24H18ClNO7S
ethyl (2E)-2-[[5-(2-chlorophenyl)furan-2-yl]methylidene]-3-oxo-4-(1,1,3-trioxo-1,2-benzothiazol-2-yl)butanoate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[3-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (E)-3-(4-methyl-3-nitrophenyl)-2-(3-thiophen-2-yl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-6-yl)prop-2-enoate —— C20H17N5O4S2
ethyl (E)-3-(4-methyl-3-nitrophenyl)-2-(3-thiophen-2-yl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-6-yl)prop-2-enoate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate —— C21H23F3N2O4S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-4-oxo-5-[[2-(trifluoromethyl)phenyl]methylidene]-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (E)-3-(4-chloro-3-nitrophenyl)-2-(3-thiophen-2-yl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-6-yl)prop-2-enoate —— C19H14ClN5O4S2
ethyl (E)-3-(4-chloro-3-nitrophenyl)-2-(3-thiophen-2-yl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-6-yl)prop-2-enoate
—— ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate —— C20H17FN2O4S2
ethyl (2E)-2-[(5Z)-3-[2-(3-fluoroanilino)-2-oxoethyl]-4-oxo-5-(thiophen-3-ylmethylidene)-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(5-methylthiophen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C21H19FN2O4S2
ethyl (2Z)-2-[(5E)-3-[2-(3-fluoroanilino)-2-oxoethyl]-5-[(5-methylthiophen-2-yl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(3-bromo-4-fluorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H20BrFN2O5S
ethyl (2Z)-2-[(5E)-5-[(3-bromo-4-fluorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[2-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C21H24F2N2O5S
ethyl (2Z)-2-[(5E)-3-[2-(diethylamino)-2-oxoethyl]-5-[[2-(difluoromethoxy)phenyl]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetate
—— ethyl (2Z)-2-[(5E)-5-[(2,3-dichlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate —— C19H20Cl2N2O5S
ethyl (2Z)-2-[(5E)-5-[(2,3-dichlorophenyl)methylidene]-3-[2-(2-methoxyethylamino)-2-oxoethyl]-4-oxo-1,3-thiazolidin-2-ylidene]acetate