| 摘要 |
Prostaglandin derivatives corresponding to the general formula: <IMAGE> wherein R1 represents hydrogen, methyl or ethyl, R2, R3 and R4, which are the same or different, each represent hydrogen or methyl and R is selected from the groups consisting of: <IMAGE> <IMAGE> in which R5 represents hydrogen, methyl or ethyl, R6 represents methyl, ethyl or acetyl and R7 and R8, when they are different, each represent hydrogen or a branched- or straight-chain alkyl group having from 1 to 7 carbon atoms or R7 and R8, when they are identical, each represent hydrogen or a straight-chain alkyl group having from 1 to 3 carbon atoms with the provisos that: |
