You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[[(2R)-1-[(6aS)-6-hydroxy-2,3-bis(hydroxymethyl)-8-methylidene-11-oxo-6,6a,7,9-tetrahydropyrrolo[2,1-c][1,4]benzodiazepine-5-carbonyl]oxypropan-2-yl]disulfanyl]propanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C22H28N2O8S2
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