Eplerenone; methyl (4aS,4bR,5aR,6aS,7R,9aS,9bR,10R)-4a,6a-dimethyl-2,4'-dioxo-2,4,4a,4',5a,5',6,6a,8,9,9a,9b,10,11-tetradecahydro-3H,3'H-spiro[cyclopenta[1,2]phenanthro[4,4a-b]oxirene-7,2'-furan]-10-carboxylate; CAS No.: 107724-20-9; As a worldwide chemical supplier, ChemShuttle provides methyl (4aS,4bR,5aR,6aS,7R,9aS,9bR,10R)-4a,6a-dimethyl-2,4'-dioxo-2,4,4a,4',5a,5',6,6a,8,9,9a,9b,10,11-tetradecahydro-3H,3'H-spiro[cyclopenta[1,2]phenanthro[4,4a-b]oxirene-7,2'-furan]-10-carboxylate, a key building block for pharmaceutical applications. Their custom synthesis services enable precise and scalable production.