Notes: 7-Aminocephalosporanic acid (7-ACA) is a building block of cephalosporin antibiotics, including cephalosporin C (Item No. 33262) and cefapirin (Item No. 17406).{65957,65958} It binds to heat shock protein 90β (Hsp90β; Kd = 6.201 µM) and inhibits sterol regulatory element binding protein (SREBP) activation in a reporter assay using Hl 7702 cells when used at a concentration of 40 µM.{65959} 7-ACA (40 µM) inhibits increases in total cholesterol and triglyceride levels induced by palmitic acid (Item No. 10006627) and oleic acid (Item Nos. 90260 / 24659) in HepG2 cells. It reduces hepatic steatosis in mice fed a high-fat diet when administered at doses ranging from 5 to 25 mg/kg. 7-ACA (10 mg/kg) inhibits the growth of M. leprae in mice.{65960} It is also a potential impurity in commercial preparations of cefoperazone.{65961}