41639-53-6 5-HEPTENOIC ACID, 7-(3,5-DIHYDROXY-2-(7-ETHOXY-3-HYDROXY-1-HEPTENYL)CYCLOPENTYL) 5-Heptenoic acid, 7-(3,5-dihydroxy-2-(7-ethoxy-3-hydroxy-1-heptenyl)cyclopentyl)-, (1R-(1-alpha(Z),2-beta(1E,3S*),3-alpha,5-alpha))-