You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3R,5S,8S,9S,10R,13S,14S)-3-hydroxy-10-(methoxymethyl)-3,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2-(5-methyltetrazol-1-yl)ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H40N4O3
assistant