Synonyms: Ro 12-2503;AC1L51BV;81844-75-9;17alpha-Hydroxy-6beta,7beta-methylene-3-oxo-D-homo-17aalpha-pregna-4,16-dien-21-carboxylic acid;3'H-Cyclopropa(6,7)-D-homopregna-4,6,16-triene-21-carboxylic acid, 6,7-dihydro-17a-hydroxy-3-oxo-, (6alpha,7alpha,17aalpha)-