Formula: C21H20O5 | Mol. Weight: 352.40 g/mol
IUPAC: (1S,12S,13S,16R,18S)-5-methoxy-16,18-dimethyl-2,9-dioxo-17-oxapentacyclo[11.4.1.01,10.03,8.012,16]octadeca-3(8),4,6,10-tetraene-18-carbaldehyde
CC12CCC3C1C=C4C(=O)C5=C(C=C(C=C5)OC)C(=O)C4(C3(C)C=O)O2