11alpha-Hydroxy-9,15-dioxo-2,3,4,5,20-pentanor-19-carboxyprostanoic acid 24769-56-0 Cyclopentaneoctanoic acid, 2-(2-carboxyethyl)-5-hydroxy-epsilon,3-dioxo-, (1R-(1alpha,2beta,5beta))- Hdopnp PGE-Mum