You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl (1'R,2R,2'S,3R,3aS,6S,6'R,7aR,8'R,10'S,11'R,14'S)-14'-hydroxy-3,6,6',11'-tetramethylspiro[3,3a,5,6,7,7a-hexahydrofuro[3,2-b]pyridine-2,5'-pentacyclo[8.8.0.02,8.06,8.011,16]octadec-16-ene]-4-carboxylate;benzyl (1'R,2R,2'S,3R,3aS,6S,6'R,7aR,8'R,10'S,11'R)-3,6,6',11'-tetramethyl-14'-oxospiro[3,3a,5,6,7,7a-hexahydrofuro[3,2-b]pyridine-2,5'-pentacyclo[8.8.0.02,8.06,8.011,16]octadec-15-ene]-4-carboxylate;methane is the IUPAC name of a molecule. Please give its molecular formula.
user
C73H100N2O8
assistant