You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R,4R,6S,10R,11S,12E,15S)-11-hydroxy-19,21-dimethoxy-8,8,15-trimethyl-3,7,9,16-tetraoxatetracyclo[16.4.0.02,4.06,10]docosa-1(18),12,19,21-tetraen-17-one by IUPAC nomenclature, provide its molecular formula.
user
C23H30O8
assistant