FIELD: organic chemistry and technology. SUBSTANCE: product: tricycle compound of the formula (I)  where: adjacent pairs R1 and R2, R3, and R4, R5 and R6 form other bond with carbon atoms or they mean H; R2 can be lower alkyl; R7 - hydrogen, hydroxy-group, protected hydroxy-group, lower alkoxy-group; or R7 together with R1 form oxo-group; R8 - hydrogen or hydroxy-group; R9 - lower alkyl, alkenyl or lower alkyl substituted with oxo-group; R10-R17 - independently hydrogen or lower alkyl; R18 and R19 - independently R
 where: adjacent pairs R1 and R2, R3, and R4, R5 and R6 form other bond with carbon atoms or they mean H; R2 can be lower alkyl; R7 - hydrogen, hydroxy-group, protected hydroxy-group, lower alkoxy-group; or R7 together with R1 form oxo-group; R8 - hydrogen or hydroxy-group; R9 - lower alkyl, alkenyl or lower alkyl substituted with oxo-group; R10-R17 - independently hydrogen or lower alkyl; R18 and R19 - independently R
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Authors
Dates
1997-05-20—Published
1991-09-03—Filed