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-(7,7-dimethyl-6-oxa-9-azaspiro[4.5]decan-9-yl)-7-ethyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-5-one .
user
C17H24N4O2S
assistant