Synonyms: 1H,8H-Furo[2'',3'':6,7;4'',5'':7',8']dinaphtho[2,3-c:2',3'-c']dipyran-1,8,10,15-tetrone,3,4,12,13-tetrahydro-6,9,17-trihydroxy-7-methoxy-3,12-dimethyl-, (3R,12R)-(9CI); 1H,8H-Furo[2'',3'':6,7;4'',5'':7',8']dinaphtho[2,3-c:2',3'-c']dipyran-1,8,10,15-tetrone,3,4,12,13-tetrahydro-6,9,17-trihydroxy-7-methoxy-3,12-dimethyl-, (3R-cis)-;Viopurpurin (8CI)