You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-[(2S)-2-[[(3S,6S,9S,12S)-3-[(2-methoxy-2-oxoethyl)carbamoyl]-5,8,11-trioxo-6,9-di(propan-2-yl)-1,14-dioxa-4,7,10-triazacyclooctadec-12-yl]carbamoyl]pyrrolidine-1-carbonyl]pyrrolidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
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