(7,8,10-trimethyl-2,4-dioxo-4,10-dihydro-2H-benzo[g]pteridin-3-yl)acetic acid; 1,8-diazabicyclo[5.4.0]undec-7-ene T=25.9°C; cat.: 3-benzyl-5-(2-hydroxyethyl)-4-methylthiazolium salt; relative initial rate; var. cat.;