Synonyms: (8r,9s,10r,13s,14s,17r)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3'h-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(4'h,6h)-dione;AC1L6MNN;C15090;KST-1A0289;NSC65899;NSC70590;AR-1A7240;NSC-65899;NSC-70590;17-Hydroxy-3-oxo-17alpha-pregna-1,4-diene-21-carboxylic acid, gamma-lactone;(8R,9S,10R,13S,14S,17R)-10,13-dimethylspiro[7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-17,5'-oxolane]-2',3-dione