(2S,3R)-1,2,3,4-Tetrahydro-2,3,5-trihydroxy-7-methoxy-2-methyl-9,10-anthracenedione

Dactylarin is cytotoxic antibiotic. Dactylarin isolated from Dactylaria lutea (Deuteromycetes). Cytotoxic effect of dactylarin on Ehrlich ascites carcinoma cells is caused by the inhibition of some SH-dependent glycolytic enzymes, especially of hexokinase (EC 2.7.1.1), glyceraldehyde-3-phosphate dehydrogenase (EC 1.2.1.12) and 6-phosphofructokinase (EC 2.7.1.11). Dactylarin interacts with thiols, which explains its inhibitory effectiveness on the above glycolytic enzymes.