You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-propan-2-yl-3,3a,4,6,7,7a-hexahydro-2H-furo[3,2-c]pyridine;6-propan-2-yl-3,3a,4,5,7,7a-hexahydro-2H-furo[2,3-c]pyridine;5-propan-2-yl-2,3,3a,4,6,6a-hexahydro-1H-pyrrolo[2,3-c]pyrrole;7-propan-2-yl-1,3,5,6,8,8a-hexahydro-[1,3]oxazolo[3,4-a]pyrazine;8-propan-2-yl-3,4,6,7,9,9a-hexahydro-1H-pyrazino[2,1-c][1,4]oxazine;2-propan-2-yl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazine;7-propan-2-yl-6,8-dihydro-5H-imidazo[1,2-a]pyrazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C67H129N13O4
assistant