You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,22R,25S)-16-acetyl-13-(5-methylpyrazin-2-yl)-25-propanoyl-3,17,18,21-tetrazapentacyclo[19.2.2.111,15.01,22.018,26]hexacosa-11(26),12,14,16-tetraen-20-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H40N6O3
assistant