You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 10-methyl-N-[(2S)-3-methylbutan-2-yl]-7-thia-9,11-diazatricyclo[6.4.0.02,6]dodeca-1(12),2(6),8,10-tetraen-12-amine by IUPAC nomenclature, provide its molecular formula.
user
C15H21N3S
assistant