Maleyl — Ma*le yl, n. [Maleic + yl.] (Chem.) A hypothetical radical derived from maleic acid. [1913 Webster] … The Collaborative International Dictionary of English
Catechin — IUPAC name (2R,3S) 2 (3,4 dihydroxyphenyl) 3,4 dihydro 2H chromene 3,5,7 … Wikipedia