Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 59-92-7, Whether you call it Levodopa, Beta-(3 -4 Dihydroxyphenyl)-L-alanine , L-3-Hydroxytyrosine , (-)-3-(3 -4-Dihydroxyphenyl)-L-alanine , Dihydroxyphenylalanine or L-DOPA you can be assured the Levodopa products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.