Showing structure for [(5s,8r,11s,12s,13r,21r)-13,17,18-trihydroxy-2,10,14-trioxo-5,21-bis(3,4,5-trihydroxybenzoyloxy)-7-[(3,4,5-trihydroxybenzoyloxy)methyl]-3,6,9,15-tetraoxatetracyclo[10.7.1.1⁴,⁸.0¹⁶,²⁰]henicosa-1(19),16(20),17-trien-11-yl]acetic acid