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 (17S,18S)-18-methyl-6,7,8-triazapentacyclo[11.7.0.02,10.05,9.014,18]icosa-2(10),3,5,8-tetraen-17-ol .
user
C18H23N3O
assistant