7,8-Dimethylalloxazine;riboflavin minus its ribityl side chain; produced by ultraviolet irradiation of riboflavin in acid solution. ... (05 Mar 2000) ... 
Type: Term Pronunciation: lū′mi-krōm Definitions: 1. riboflavin minus its ribityl side chain; produced by ultraviolet irradiation of riboflavin in acid solution.