中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2,5-dihydroxy-3,6-bis-(4-methoxy-phenyl)-[1,4]benzoquinone | 38558-72-4 | C20H16O6 | 352.343 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Acetic acid 4-methoxy-2,5-bis-(4-methoxy-phenyl)-3,6-dioxo-cyclohexa-1,4-dienyl ester | 186499-93-4 | C23H20O7 | 408.408 |
—— | rickenyl E | 186499-92-3 | C21H18O6 | 366.37 |
—— | 4-Hydroxy-3,6,6-trimethoxy-2,5-bis-(4-methoxy-phenyl)-cyclohexa-2,4-dienone | 186499-91-2 | C23H24O7 | 412.439 |
Total syntheses of the p-terphenyls butlerin A (1) (3′,4,4′′,6′-tetramethoxy[1,1′:4′,1′′-terphenyl]-2′-yl acetate), butlerin B (2) (3′,4,4′′,5′-tetramethoxy[1,1′:4′,1′′-terphenyl]-2′-yl acetate) and butlerin C (3) (3′,4,4′′-trimethoxy[1,1′:4′,1′′-terphenyl]-2′,6′-diyl diacetate), previously isolated from the lichen Relicina connivens, are reported.
Butlerin D (4) (3',4,4",5',6'-pentamethoxy[1,1':4',1"-terphenyl]-2'-yl acetate), butlerin E (5) (3',4,4'6'-tetramethoxy[1,1':4',1"-terphenyl]-2',5'-diyl diacetate ) and butlerin F (6) (3',4,4",5'- tetramethoxy [1,1":4',1"-terphenyl]-2',6'-diyl diacetate ) have been synthesized and shown to co-occur with usnic acid, butlerin A (1), butlerin B (2) and butlerin C (3) in the lichen Relicina connivens.