You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-(3-but-3-ynyldiazirin-3-yl)propanoyl]-3,4-dihydro-1H-isoquinoline-1-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H19N3O3
assistant