Suggested Reaction 1.3.5.-

Left

5,6-Dihydroxy-3-methyl-2-oxo-1,2-dihydroquinoline
+CoQH2

Right

5,6-Dihydroxy-3-methyl-2-oxo-1,2,5,6-tetrahydroquinoline
+CoQ

[BiSSCat | GREP ]