3-(3-Hydroxy-2-(hydroxymethyl)phenyl)propanoic acid, 2-hydroxymethyl-3-hydroxy-(E)-cinnamic acid, and colletofurans A–E were isolated from Colletotrichum boninense AM-12–2. Colletofurans A–E are the first natural compounds featuring a 1-octyl-1,3-dihydroisobenzofuran core. Their structures were initially established by 1D/2D-NMR and HRESITOFMS. Mosher’s ester method was used to determine the absolute configurations of secondary alcohols in colletofurans A–C. The structures of colletofurans A and B–E were further confirmed by DFT GIAO calculations and the X-ray crystalline sponge method, respectively.

中文翻译：

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Collinotrichum boninense AM-12-2的Colletofurans AE，1-Octyl-1,3-dihydroisobenzobenzofuran衍生物。

从Colletotrichum boninense AM-12-2中分离出3-（3-羟基-2-（羟甲基）苯基）丙酸，2-羟甲基-3-羟基-（E）-肉桂酸和Colletofurans A–E 。Colltotofurans A–E是第一个具有1-辛基-1,3-二氢异苯并呋喃核心的天然化合物。它们的结构最初是通过1D / 2D-NMR和HRESITOFMS建立的。Mosher的酯法用于确定呋喃呋喃A–C中仲醇的绝对构型。通过DFT GIAO计算和X射线结晶海绵法分别进一步证实了呋喃呋喃A和B–E的结构。