3-(2-hydroxyethyl)-1H-indol-5-ol 120465-13-6 154-02-9 4-21-00-02181 (Beilstein Handbook Reference) 5-Hydroxy-1H-indole-3-ethanol 5-Hydroxyindole-3-ethanol BRN 0143517 EINECS 205-820-4 Hydroxytryptophol NSC 84416 AIDS166244 1H-Indole-3-ethanol, 5-hydroxy- 5-Hydroxytryptophol Indole-3-ethanol, 5-hydroxy- NSC84416 AIDS-166244 1H-Indole-3-ethanol, 5-hydroxy- (9CI)