4-((5-(1,2-Dithiolan-3-yl)-1-oxopentyl)amino)butanoic acid 4-(DL-alpha-Lipamido)butyric acid 59547-52-3 BUTANOIC ACID, 4-((5-(1,2-DITHIOLAN-3-YL)-1-OXOPENTYL)AMINO)- LABA