You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2R,3R,4S,5S,6S)-5-acetamido-3,4-diacetyloxy-6-[(E)-[2-oxo-1-(2-phenoxyethyl)indol-3-ylidene]amino]oxyoxan-2-yl]methyl acetate by IUPAC nomenclature, provide its molecular formula.
user
C30H33N3O11
assistant