You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-[[7-(thiophen-3-ylmethyl)-6,8-dihydro-5H-2,7-naphthyridin-4-yl]methyl]methanesulfonamide ?
user
C15H19N3O2S2
assistant