2H,16H-6,9-Etheno-1,24:11,15-dimethenopyrido[2',3':17,18][1,11]dioxacycloheneicosino[2,3,4-ij]isoquinoline,thalicberan-7,12-diol deriv.; 7-O-Desmethylisothalicberine;O7-Demethylisothalicberine
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