IMPPAT Phytochemical information: 
(3,4,5,11,13,21,22,23-Octahydroxy-8,18-dioxo-9,14,17-trioxatetracyclo[17.4.0.02,7.010,15]tricosa-1(23),2,4,6,19,21-hexaen-12-yl) 3,4,5-trihydroxybenzoate