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竹红菌甲素(简称HA)是一种新发现的苝醌衍生物,其结构之一已被确定为HAb。在HA的~1H NMR中酚羟基质子的化学位移为16ppm左右,母环上质子化学位移在6.6ppm左右,介于芳香型质子和醌型质子,如
Hypocrellin A (HA) is a newly discovered perylenequinone derivative whose structure has been identified as HAb. The chemical shifts of phenolic hydroxyl protons in ~ 1H NMR of HA are about 16 ppm, and the proton chemical shifts in parent ring are around 6.6 ppm, ranging between aromatic protons and quinoid protons such as