You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,2E,4S,10S,12R,14S,15S)-12-methyl-17-oxo-4-prop-1-en-2-yl-11,16,18,19-tetraoxapentacyclo[12.2.2.16,9.01,15.010,12]nonadeca-2,6,8-triene-7-carbaldehyde into its molecular formula.
user
C20H20O6
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