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Fig. 3 HPTLC chromatogram of Krai-krue in different solvent systems detected under UV 323 nm. Absorption
spectrum scanned from wavelength 200-450 nm was demonstrated in the right corner of each chro-
matogram.
Fig. 4 HPTLC chromatogram of HNK detected under UV323 nm. Absorption spectrum scanned from wave-
length 200-450 nm was demonstrated in the right corner of each chromatogram.
