qx39 qx39 qx39 (compound a, ca39) is a synthetic compound that activates chaperone-mediated autophagy (cma) by increasing the expression of the lysosomal receptor for this pathway, lamp2a lysosomes. it showed potent activity in vitro but has poor pharmacokinetic properties and was not suitable for animal research. subsequent research led to the development of ca77.1, a cma activator suitable for in vivo use. qx39identifiers iupac name n-(4-(6-chloroquinoxalin-2-yl)phenyl)acetamide cas number1798331-71-1pubchem cid91809172chemical and physical dataformulac20h14clnomolar mass319.79 g·mol−13d model (jsmol)interactive image smiles c1c(=nc2=c(o1)c=c(c=c2)cl)c3=cc=c(c=c3)c4=cc=cc=c4 inchi inchi=1s/c20h14clno/c21-17-10-11-18-20(12-17)23-13-19(22-18)16-8-6-15(7-9-16)14-4-2-1-3-5-14/h1-12h,13h2key:rjfbvauzkphmji-uhfffaoysa-n