Two new monoterpene glycosides and trypanocidal terpenoids from Dracocephalum kotschyi

Abstract

From the whole plant of Dracocephalum kotschyi BOISS., two new monoterpene glycosides (9, 10), together with seven known terpenoids and a phytosterol (1-8), were isolated. Their structures were determined to be limonen-10-al (1), geranial (2), neral (3), β-sitosterol (4), oleanolic acid (5), ursolic acid (6), p-mentha-8-en-1,2-diol (7), colosolic acid (8), limonen-10-ol 10-O-β-D-glucopyranoside (9), and limonen-10-ol 10-O-β-D- glucopyranosyl-(1→2)-β-D-glucopyranoside (10). Compounds 1 (3.1 μM), 2 (3.1 μM), 3 (3.1 μM), 5 (6.2 μM), 6 (6.2 μM), and 8 (6.2 μM) were effective against epimastigotes of Trypanosoma cruzi. © 2004 Pharmaceutical Society of Japan.