Lonicera iridoids from

Souzu 1, Mitsuhashi H (1970) Structures of iridoids from Lonicera morrowii A. Gray 11. Tetrahedron Lett 11 191-192... 

Thirty-three known iridoid and secoiridoid glucosides have been analysed by gas chromatography of their trimethylsilyl derivatives. G.c.-m.s. analysis of several representative compounds e.g. 4-CO2H, 4-C02Me, 4-unsubstituted) demonstrated the feasibility of iridoid-containing plant extract analysis and resulted in the identification of secologanoside 11-methyl ester (99 R = H, X = CH2) from Lonicera morrowii the sixth paper in a series of chemotaxonomic studies on iridoids illustrates the need for accurate analysis of minor components. ... 

Lonicera angustifolia Wallich ex DC is a deciduous, erect shrub 1.8-3.6 m high, with sweet edible berries, found in the Himalaya from Kashmir to Kumoan, Nepal, Arunachal Pradesh at an altitude of 1,800 -3,600 m. [67,153]. Oleanolic acid, ursolic acid and methyl 4-hydroxy benzoate with iridoids and secoiridoids sweroside, loganin and 6 -0-p-apiofuranosyl sweroside (121) have been isolated from leaves [182]. Its fruits are used in folk medicine to relieve gastric troubles in cattle, flowers are useful source of be-forage. 

Secoiridoid, lonijaposide C (156) isolated from Lonicera japonica also showed inhibitory activity against the release of glucuronidase in rat PMN leukocytes induced by PAF with an inhibition rate of 69.5% at 10 pM. Possibly the presence of pyridinium ion at C-7 position was responsible for this inhibitory activity [161]. These iridoids may be used as anti-inflammatory drugs. 

Calls I, Lahloub MF, Sticher O 1984 18. Loganin, loganic acid and periclymenoside, a new biosidic ester iridoid glucoside from Lonicera periclymenum L. (Caprifoliaceae). Helv Chim Acta 67 160-165... 

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