| abstract |
PURPOSE: the title cpds. I(Y is trans-vinylene or ethylene; R 1 is H or alkyl; R 2 is H, methyl or ethyl; R 3 is a direct bond or alkylene; R 4 is H, alkyl, phenyl, etc.; the dotted line is α-coordination or β-coordination or their mixture), e.g. 5-oxa-6ξ, 9α-epoxy-11α, 15α-dihydroxyprostotrans-13-enoic acid methylester. n COPYRIGHT: (C)1978,JPO&Japio |