You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (6aR,9R)-N-(3-methoxycyclohexyl)-7-prop-2-enyl-4-propyl-6,6a,8,9,10,10a-hexahydroindolo[4,3-fg]quinoline-9-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C28H39N3O2
assistant