Quantification of Barbatusin and 3β-Hydroxy-3-deoxybarbatusin in Plectranthus Species by HPLC-DAD

Figure 2

HPLC chromatograms (254 nm) of standard compounds 1 (a) and 2 (b) and the ethanol extract of P. grandis (c and d).

(a)

(b)

(c)

(d)