2a,2b-Dihomo-pgd2 2a,2b-Dihomo-prostaglandin D2 64072-63-5 7-NONENOIC ACID, 9-(5-HYDROXY-2-(3-HYDROXY-1-OCTENYL)-3-OXOCYCLOPENTYL)-, (1R-(1 7-Nonenoic acid, 9-(5-hydroxy-2-(3-hydroxy-1-octenyl)-3-oxocyclopentyl)-, (1R-(1-alpha(Z), 2-beta(1E,3S*),5-alpha))-