You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-amino-N-[(E,3S)-7-amino-1-(benzenesulfonyl)hept-1-en-3-yl]-3-[4-(morpholine-2-carbonyl)phenyl]propanamide;hydrobromide by IUPAC nomenclature, provide its molecular formula.
user
C27H37BrN4O5S
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