(-)-(S)-3-(4-Phenyl-1-piperazinyl)-1,2-propanediol (-)-Dropropizine 1,2-Propanediol, 3-(4-phenylpiperazin-1-yl)-, S(-)- 99291-25-5 DF 526 Danka Levdropropizine Levodropropizina [INN-Spanish] Levodropropizine Levodropropizine [INN] Levodropropizinum [INN-Latin] Levotuss S(-)-3-(4-Phenylpiperazin-1-yl)propane-1,2-diol