You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-2-[2-[[5-(8-methyl-2,3,6a,7,8,10a-hexahydrofuro[3,2-c]carbazol-6-yl)cyclohexa-1,3-dien-1-yl]methyl]-5-pyridin-4-yl-1,5-dihydro-1,2,4-triazol-3-yl]but-2-en-1-amine by IUPAC nomenclature, provide its molecular formula.
user
C33H38N6O
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