You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[[3-[(1R,5S)-3-(1,3-benzothiazol-5-yl)-3-azabicyclo[3.1.0]hexan-6-yl]-1,2,4-oxadiazol-5-yl]methyl]-7-methylpurin-6-one using the IUPAC nomenclature.
user
C21H18N8O2S
assistant