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 2-cyclopentyl-N-[2-[3-(4-methoxyphenyl)-4-methyl-5-oxo-1,2,4-triazol-1-yl]ethyl]acetamide ?
user
C19H26N4O3
assistant