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 (7R)-5-[(5-methylthiophen-2-yl)methyl]-7-(pyridin-2-ylmethoxymethyl)-4,6,7,8-tetrahydropyrazolo[1,5-a][1,4]diazepine .
user
C20H24N4OS
assistant