You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-aminopropyl)-2-[2-(diethylamino)-9-[2-(1H-indol-3-yl)ethyl]-6-methylpurin-8-yl]sulfanylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H34N8OS
assistant