You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-N-[(1R,3S)-2,2-dimethyl-3-(piperidine-1-carbonyl)cyclobutyl]-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-prop-1-en-2-yl-1,2,3,4,5,6,7,7a,9,10,11,11b,12,13,13a,13b-hexadecahydrocyclopenta[a]chrysene-3a-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C42H68N2O3
assistant