15-cyclohexyl-9-deoxo-13,14-dihydro-2',9 alpha-methano-4,5,6,16,17,18,19,20-octanor-3-oxa-3,7-(1',3'-interphenylene)PGE1
15-cyclohexyl-9-deoxo-13,14-dihydro-2',9 alpha-methano-4,5,6,16,17,18,19,20-octanor-3-oxa-3,7-(1',3'-interphenylene)pge1