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 2-[(1R,8R,9S)-8-(hydroxymethyl)-6-oxo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-11-yl]-N-[(2-methoxyphenyl)methyl]acetamide ?
user
C22H27N3O4
assistant