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 2,5-dimethyl-N-[(3-methyl-1,2,4-oxadiazol-5-yl)-(oxan-4-yl)methyl]thieno[2,3-d]pyrimidin-4-amine .
user
C17H21N5O2S
assistant