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4-Bromocatechol17345-77-635 % similar 4-Chlorocatechol2138-22-935 % similar 4-Fluoro-1,2-benzenediol367-32-835 % similar Forsythoside E93675-88-835 % similar (±)-Norepinephrine138-65-835 % similar Noradrenaline51-41-235 % similar Erianin95041-90-035 % similar (+-)-Isoproterenol hydrochloride51-30-935 % similar Levisoprenaline hydrochloride5984-95-235 % similar (±)-Isoproterenol hydrochloride949-36-035 % similar Carbidopa28860-95-935 % similar (-)-3-(3,4-Dihydroxyphenyl)-2-methyl-L-alanine sesquihydrate41372-08-135 % similar 4-Ethylguaiacol2785-89-934 % similar 3',4'-Dihydroxypropiophenone7451-98-134 % similar 2-tert-Butyl-4-ethylphenol96-70-834 % similar 3-Aminotyrosine300-34-534 % similar 3-O-Methyldopa7636-26-234 % similar 3',4'-Dihydroxyacetophenone1197-09-733 % similar (±)-Epinephrine hydrochloride329-63-533 % similar 3-Fluoro-DL-tyrosine403-90-733 % similar