5H,17H-1,23:11,13-Diethano-2H,14H-[1,11]dioxacycloeicosino[2,3-b:12,13-b']dipyridin-4a(24aH)-ol,octadecahydro-, [4aS-(4aR*,11R*,12aS*,16aS*,23R*,24aS*)]-
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