| 单词 | phenanthraquinone | 
| 释义 | > as lemmasphenanthraquinone   phenanthraquinone  n.  Brit.  , U.S.  , ΚΠ 1876    H. E. Armstrong Introd. Stud. Org. Chem. 135  				Phenanthraquinone crystallises in orange-yellow needles, and melts at about 200°. 1968    I. L. Finar Org. Chem. 		(ed. 4)	 II. x. 419  				An example of the latter [sc. an internal Friedel-Crafts reaction] is the preparation of phenanthraquinone from benzil. 1991    Phytochemistry 30 2094/1  				Phenanthraquinone was prepared by chromic acid oxidation of phenanthrene in the usual manner. < as lemmas  | 
	
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