Complex sentence: Today, most "ortho"-vanillin is used in the study of mutagenesis and as a synthetic precursor for pharmaceuticals, for example, benafentrine and an antiandrogen compound called Pentomone.
Split into simpler sentences: Today, most "ortho"-vanillin is used in the study of mutagenesis and as a synthetic precursor for pharmaceuticals. As example, "ortho"-vanillin is used to make an antiandrogen compound called Pentomone.