noun questin (organic compound) The substituted anthraquinone 3-methyl, 1,6-dihydroxy, 8-methoxy 9,10-anthraquinone found in some species of Rubiaceae. 1
noun questin (organic chemistry) The substituted anthraquinone 3-methyl, 1,6-dihydroxy, 8-methoxy 9,10-anthraquinone found in some species of Rubiaceae. 0
