You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-[(1S)-2-[[(2S)-1-[(3R,3aS,6aR)-3-methyl-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-2-yl]-3,3-dimethyl-1-oxobutan-2-yl]amino]-1-cyclohexyl-2-oxoethyl]pyrazine-2-carboxamide ?
user
C27H41N5O3
assistant