138258-82-9 4,5-Heptadienoic acid, 7-(2-(3-hydroxy-4-phenoxy-1-butenyl)-3-methyl-5-oxocyclopentyl)-, methyl ester, (1R-(1alpha(R*),2beta(1E,3R*),3alpha))- Methyl-7-(3-methyl-2-(3-hydroxy-4-phenoxy-1-butenyl)-5-oxocyclopentyl)-4,5-heptadienoate RS 61565 RS-61565