Formula: C20H18O5 | Mol. Weight: 338.40 g/mol
IUPAC: (4'aS,5'R,8'S,8'aS)-5',8'-dihydroxyspiro[2,4-dioxatricyclo[7.3.1.05,13]trideca-1(12),5,7,9(13),10-pentaene-3,4'-4a,5,6,7,8,8a-hexahydronaphthalene]-1'-one
C1CC(C2C(C1O)C(=O)C=CC23OC4=CC=CC5=C4C(=CC=C5)O3)O