You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3S,7R)-15-(2-pyridin-2-ylethynyl)-5-oxa-10,18-diazatetracyclo[8.8.0.03,7.012,17]octadeca-1(18),12(17),13,15-tetraen-11-one .
user
C22H19N3O2
assistant