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Ophiamides A-B, New Potent Urease Inhibitory Sphingolipids from Heliotropium ophioglossum
Sadiqa Firdous,Abdul Malik,Nida Hassan Ansari,Itrat Fatima,Nighat Afza,Lubna Iqbal,Mehreen Lateef 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.7
Ophiamides A (1) and B (2), two new sphingolipids have been isolated from the n-hexane subfraction of the MeOH extract of the whole plant of Heliotropium ophioglossum along with glycerol monopalmitate (3) and β-sitosterol 3-O-β-D-glucoside (4) reported for the first time from this species. Their structures were elucidated by spectroscopic techniques including MS and 2D-NMR spectroscopy. Both the compounds 1 and 2 showed potent inhibitory activity against the enzyme urease.