TY - JOUR
T1 - Studies on the constituents of Leonotis nepetaefolia
AU - Narukawa, Y.
AU - Shimizu, N.
AU - Takeda, T.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Three new acylated iridoids were isolatad from a methanol extract of Leonotis nepetaefolia R. Br. (Labiatae). Their structures were elucidated as 10-O-(cis-3, 4-dimethoxycinnamoyl) geniposidic acid (2), 10-O-(trans-feruroyl) geniposidic acid (3) and 10-O-(trans-caffeoyl) geniposidic acid (4) on the basis of the spectroscopic data. Antioxidative activities of the compounds were measured by the α, α-diphenyl-β-picrylhydrazyl (DPPH) method. The new iridoid glycoside, 10-O-(trans-caffeoyl) geniposidic acid showed a strong antioxidative activity.
AB - Three new acylated iridoids were isolatad from a methanol extract of Leonotis nepetaefolia R. Br. (Labiatae). Their structures were elucidated as 10-O-(cis-3, 4-dimethoxycinnamoyl) geniposidic acid (2), 10-O-(trans-feruroyl) geniposidic acid (3) and 10-O-(trans-caffeoyl) geniposidic acid (4) on the basis of the spectroscopic data. Antioxidative activities of the compounds were measured by the α, α-diphenyl-β-picrylhydrazyl (DPPH) method. The new iridoid glycoside, 10-O-(trans-caffeoyl) geniposidic acid showed a strong antioxidative activity.
KW - Antioxidative activity
KW - Iridoid glycoside
KW - Labiatae
KW - Leonotis nepetaefolia
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M3 - Article
AN - SCOPUS:0034995792
VL - 55
SP - 79
EP - 82
JO - Journal of Natural Medicines
JF - Journal of Natural Medicines
SN - 1861-0293
IS - 2
ER -