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The MS/MS spectrum of typical compounds. (A) anthraquinones: emodin; (B) anthrones: sennoside A; (C) stilbenes: resveratrol 4′-O-β-D-glucopyranoside; (D) naphthalenes: torachrysone 8-O-β-D-glucopyranoside; (E) butyrophenones: isolindleyin; (F) tannins: gallic acid; (G) tannins: (+)-catechin; (H) flavonoids: phlorizin.
