Figure 1.
The structures of the isolated flavonoids from Salvia macrosiphon.
1 R1 = H ; R2 = OCH3 ; R3 = OCH3 ; R4 = H
3 R1 = H ; R2 = OCH3 ; R3 = OCH3 ; R4 = OCH3
4 R1 = H ; R2 = OH ; R3 = OGlc ; R4 = H
5 R1 = OH ; R2 = OH ; R3 = OGlc ; R4 = H
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