Cistus laurifolius

J. de Pascual Teresa, J.G. Urones, I.S. Marcos, F. Bermejo, P. Basabe, A rearranged labdane salmantic acid from Cistus laurifolius, Phytochemistry, 22, 2783 2785 (1983). 

Flavonoid sulphates such as quercetin 3,7-di-O-methyl 3-sulphate and kaempferol 7-0-methyl 3-sulphate, which inhihited the growth of Mycobacterium tuberculosis and Klebsiella pneumoniae, were isolated from the -hutanol fraction of 80% methanol extract of Argyreia speciosa (Burm. f) Boj. (Convolvulaceae), while flavonoids with mti-Helicobacter pylori activity, such as quercetin 3-methyl ether (isorhamnetin) (Fig. 3), were isolated from Cistus laurifolius L. (Cistaceae). ... 

Ustiin O, Ozcelik B, Akyon Y, Abbasoglu V, Yesilada E. (2006) Elavonoids with mti-Helicobacter pylori activity from Cistus laurifolius leaves. J Ethnopharmacol 108 457-461. 

The structure of the epoxy-dialdehyde (15), from Afromomum daniellii (Zingiberaceae), was established by correlation with c -12-norambreinolide. The hydroxy-acid (16), salvic acid from Eupatorium salvia,and the ring B seco-labdane jhanic acid (17) from Eupatorium jhanii are two further diterpenoids from these species of the Compositae. The structure of the latter rests on interpretation of the H and C n.m.r. data. Gutierrezia lucida (Compositae) contains the 13-epimeric acids (18) related to agathic acid together with the butenolide (19). Some esters of 6-hydroxylabdane-17-carboxylic acids were detected in G. mandonii. The investigation of Cistus species has continued. The ent-labdane acetyl-laurifolic acid (20) is a component of Cistus laurifolius ... 

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