You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 1-[(1S,8S)-12-(5-methoxy-1,3-benzoxazol-2-yl)-10-oxa-3-thia-5,12-diazatricyclo[6.3.1.02,6]dodeca-2(6),4-dien-4-yl]-3-[(3S)-oxolan-3-yl]urea ?
user
C21H23N5O5S
assistant