You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-(3-methoxypropyl)propanamide by IUPAC nomenclature, provide its molecular formula.
user
C14H21N5O2
assistant