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竹红菌甲素(简称HA)是苝醌衍生物。我们曾报道了在半胱氨酸为电子给体时光诱导的甲素净的两个电子还原而生成的亚稳态产物HAH_2的结构、ESR谱和吸收光谱。我们还报道了光敏化的半胱氨酸对甲素亲核加成中形成的中间体5-SCH_2CH(COOH)NH_2-HAH_2的
Hypocrellin A (abbreviated as HA) is a perylenequinone derivative. We have reported the structure, ESR spectrum and absorption spectrum of the metastable product HAH_2 produced by light-induced two-electron reduction of a pure form of cinenet when cysteine is an electron donor. We also reported the formation of the intermediate 5-SCH_2CH (COOH) NH_2-HAH_2 from the photoactivation of the cysteine to the nucleophile