You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R)-4-[(5R,10S,13R,17R)-1-hydroxy-10,13-dimethyl-2,3,4,5,6,7,11,12,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]-N-(4-methylpiperazin-1-yl)pentanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H47N3O2
assistant