You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (16E,18E,21R)-11-chloro-21-hydroxy-12-methoxy-9,16-dimethyl-4,24-dioxa-9,22-diazatetracyclo[19.3.1.110,14.03,5]hexacosa-10,12,14(26),16,18-pentaene-8,23-dione;chloromethane;(2S)-2-[methyl-[4-nitro-2-(trifluoromethyl)benzoyl]amino]propanoic acid by IUPAC nomenclature, provide its molecular formula.
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C38H45Cl2F3N4O11
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