Rehmannioside A

(2S,3R,4S,5S,6R) -2- (((1aS,1bS,2S,5aR,6S,6aS) -6-hydroxy-1a- (hydroxymethyl) -1a,1b,2,5a,6,6a-hexahydrooxireno[2',3':4,5]cyclopenta[1,2-c]pyran-2-yl) oxy) -6- ((((2S,3R,4S,5R,6R) -3,4,5-trihydroxy-6- (hydroxymethyl) tetrahydro-2H-pyran-2-yl) oxy) methyl) tetrahydro-2H

O[C@@H] ([C@H] (O) [C@H]1O) [C@@H] (CO[C@@H] (O[C@H] (CO) [C@H] (O) [C@@H]2O) [C@@H]2O) O[C@H]1O[C@@H]3OC=C[C@]4 ([H]) [C@@]3 ([H]) [C@] (O5) (CO) [C@]5 ([H]) [C@H]4O