ChemInform Abstract: Skimmiarepin A and B, Two New Insect Growth Inhibitory Triterpenoids from Skimmia japonica Thunb. var. intermedia Komatsu f. repens (Nakai) Hara

Abstract

ChemInform Abstract (compounds (Ia) and (Ib), resp.; structures established on the basis of chemical methods and 2D NMR).

An improved leaf‐disk antifeedant bioassay and its application for the screening of Hokkaido plants

“…The most interesting extract was from Skimmia japonica. This plant displayed the strongest activity among all samples tested, and although compounds with insect growth-inhibition properties have previously been isolated (Ochi et al, 1988), the first report of its insect feedingdeterrent activity. This plant as well as several others are currently under investigation in order to determine the structures of the active ingredients, and will be the subject of further reports.…”

Phytochemistry of the genus Skimmia (Rutaceae)

“…Takeda (1941) investigated the alcoholic extract of S. japonica from which two triterpenoids -skimmion/taraxeron 81 and skimmiol/taraxerol 80 together with skimmianine were isolated and identified. The investigation of leaves and fruits of S. japonica has led to the isolation and identification of two more triterpenoids named skimmiarepins A and B 78 and 79 (Ochi et al, 1988). The only steroid detected in S. japonica so far is b-sitosterol 72 Achenbach, 1991, 1992a).…”