You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-1-[8-[[(3S,10R,13R,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl]oxy]octoxy]-N,N-dimethyl-3-pentoxypropan-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C45H83NO3
assistant