You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(1R,2R,3aS,5S,5aR,8S,8aS,10aS,10bS,10cS)-8-formamido-1,2,5,8-tetramethyl-2,3,3a,4,5,5a,6,7,8a,9,10,10a,10b,10c-tetradecahydropyren-1-yl]-methanidylazanium by IUPAC nomenclature, provide its molecular formula.
user
C22H38N2O
assistant