17097-76-6 (CALCIUM SALT) 18679-90-8 4-[(2,4-Dihydroxy-3,3-dimethyl-1-oxobutyl)amino]butanoic acid AIDS-001624 AIDS001624 Butanoic acid, 4-[[(2R)-2,4-dihydroxy-3,3-dimethyl-1-oxobutyl]amino]- Calicum hopantenate