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 2-[1-(2-isothiocyanatoethyl)piperidin-4-ylidene]-11-methyl-4,7,11-triazatricyclo[8.3.0.03,7]trideca-1(10),3,5,12-tetraene .
user
C19H23N5S
assistant