You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,7S)-14-methoxy-5-(3-methoxypropanoyl)-2,16-dioxa-5,8,19-triazatetracyclo[19.2.2.212,15.03,7]heptacosa-1(24),12,14,21(25),22,26-hexaene-9,18-dione by IUPAC nomenclature, provide its molecular formula.
user
C27H33N3O7
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