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Aglycone cores reported from S. rebaudiana as natural forms, degradation products or forming part of a glycoside compound (R1 and R2). steviol (I); ent-atisene (II); isosteviol (III); endo steviol (IV); CH3 and OH at C-16 (V); CHO at C-16 (VI); CH2OH at C-16 (VII); C-12 linkage (VIII); 15-α-hydroxy-rebaudioside M (IX).
