Uroleuconaphins A2a, A2b, B2a, and B2b: four yellowish pigments from the aphid Uroleucon nigrotuberculatum (Olive)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

*Uroleuconaphins A_2a, A_2b, B_2a, and B_2b: four yellowish pigments from the aphid Uroleucon nigrotuberculatum* (Olive)**

Authors:	Mitsuyo Horikawa Masami Tanaka Hiroto Kaku Takeshi Nishii Tetsuto Tsunoda

Affiliation:	^aFaculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan

Abstract:	Four novel yellowish pigments, uroleuconaphins A_2a, A_2b (3a, 3b), and B_2a, B_2b (4a, 4b), were isolated from the aphid Uroleucon nigrotuberculatum (Olive). Their structures were established by detailed analyses of 1D and 2D NMR spectra and mechanistic consideration of the interconversion between 3 (or 4) and uroleuconaphin A₁ (1) (or B₁ (2)).

Keywords:	Structure determination Pigment Uroleuconaphins Aphid Uroleucon nigrotuberculatum (Olive)
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