You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl N-[1-[[1-cyano-6-(hydroxymethyl)-4-methyl-6,7-dihydro-5H-cyclopenta[c]pyridin-3-yl]oxymethyl]cyclopropyl]carbamate into its molecular formula.
user
C20H27N3O4
assistant