You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(5S,8R,9S,10R,13S,14S)-17-acetyl-10,13-dimethyl-2,5,6,7,8,9,11,12,14,15-decahydro-1H-cyclopenta[a]phenanthren-3-yl] 3-pyrrolidin-1-ium-1-ylpropanoate .
user
C28H42NO3+
assistant