You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4aS)-4a,9-dihydroxy-3-methyl-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one;(4aS)-4a,9-dihydroxy-3-methyl-2,4,7a,13-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H36N2O8
assistant