You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[[(13S,17S)-17-hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl]carbamoyloxy]acetyl]oxyethyl-trimethylazanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H39N2O5+
assistant