1a,1b-Dihomo-PGF2 1a,1b-Dihomo-PGF2alpha 1a,1b-Dihomoprostaglandin F(2) 1a,1b-Dihomoprostaglandin F2 57944-39-5 7-Nonenoic acid, 9-(3,5-dihydroxy-2-(3-hydroxy-1-octenyl)cyclopentyl)-, (1R-(1alpha(Z),2beta(1E,3S*),3alpha,5alpha))-