Sennoside A

(9R) -9-[ (9R) -2-carboxy-4-hydroxy-10-oxo-5-[ (2S,3R,4S,5S,6R) -3,4 ,5-trihydroxy-6- (hydroxymethyl) oxan-2-yl]oxy-9H-anthracen-9-yl]-4-hyd roxy-10-oxo-5-[ (2S,3R,4S,5S,6R) -3,4 ,5-trihydroxy-6- (hydroxymethyl) oxan-2-yl]oxy-9H-anthracene-2-carboxylic acid

C1=CC2=C (C (=C1) O[C@H]3[C@@H] ([C@H] ([C@@H] ([C@H] (O3) CO) O) O) O) C (=O) C4=C ([C@@H]2[C@@H]5C6=C (C (=CC=C6) O[C@H]7[C@@H] ([C@H] ([C@@H] ([C@H] (O7) CO) O) O) O) C (=O) C8=C5C=C (C=C8O) C (=O) O) C=C (C=C4O) C (=O) O