摘要
Ⅰ. INTRODUCTIONHypocrellin A (abbreviated as HA)is a perylenequinone derivative. The structure, ESR and absorption spectrum of the metastable product HAH<sub>2</sub> produced by photoinduced net two-electron reduction of HA have been reported. The absorption spec-
基金
Project supported by the National Natural Science Foundation of China.