You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1H-indazol-3-yl-[(1S,6R)-8-(pyridin-3-ylmethyl)-3,8-diazabicyclo[4.2.0]octan-3-yl]methanone ?
user
C20H21N5O
assistant