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HPTLC fingerprints of three extracts n.1, 2 and 3 as well as for four referenced samples, Effialine (Eff), chlorophyll (Chl), uteolin-7-glucoside (Lut) and oleuropein (Ole), on silica gel 60 F254 plates after a pre-migration step with dichloromethane and with dichloromethane-acetonitrile- formic acid-water 40:10:1.6:0.6 in a second step, illuminated under 366 nm after derivatization.
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