1,2-Benzenediol, 4-(1-hydroxy-2-((2-(1H-indol-3-yl)-1-methylethyl)amino)ethyl)-, (R-(R*,R*))-2,3-dihydroxybutanedioate (salt) 5781-48-6 SC 10049 SC 13674 levo-3-(2-(2-Hydroxy-2-(3,4-dihydroxyphenyl)ethylamino)propyl)indole tartrate