Synonyms: b-D-Galactopyranoside,2-chloro-4-[3-(3-chloro-4-hydroxyphenyl)-3H-2,1-benzoxathiol-3-yl]phenyl,S,S-dioxide;3H-2,1-Benzoxathiole, β-D-galactopyranoside deriv.;CPRG;Chlorophenol red β-D-galactoside;β-D-Galactopyranoside, 2-chloro-4-[3-(3-chloro-4-hydroxyphenyl)-1,1-dioxido-3H-2,1-benzoxathiol-3-yl]phenyl;