You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4R)-4-[(3R,5R,7S,8R,9R,10S,13R,14R,17S)-3,7-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-N-[2-(3,4-dimethoxyphenyl)ethyl]pentanamide by IUPAC nomenclature, provide its molecular formula.
user
C34H53NO5
assistant