You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[1-amino-5-(1H-indol-3-yl)-1,2-dioxopentan-3-yl]-4-pyridin-2-yl-1,2,5-thiadiazole-3-carboxamide ?
user
C21H18N6O3S
assistant