3,3'-(1,4-Phenylenedimethylidyne)bis[7,7-dimethyl-2-oxobicyclo[2.2.1]heptane-1-methanesulfonic Acid]-d4; 1,4-Di(2-oxo-10-Sulfo-3-bornylidenemethyl)Benzene-d4; 1,4-Di(2-oxo-10-sulpho-3-bornylidenemethyl)benzene-d4; 3,3'-(1,4-Phenylenedimethine)bis(7,7-dimethyl-2-oxo-bicyclo[2.2.1]heptane-1-methanesulfonic Acid-d4; Mexoryl SX-d4; Terephthalylidene-3,3'-dicamphor-10,10'-disulfonic Acid-d4;,Ecamsule Stable Isotopes