these pyrolysates include levoglucosan ( lg-i ) , levoglucosenone ( lg-ii ) , furfural ( ff ) , 5- ( hydroxymethyl ) -2-furfural ( hmf ) , glyoxal ( gl ) , methylglyoxal ( mgl ) , 3-deoxy-d-glucosone ( dg ) and thiazolidine ( tz ) .
C0017992
glyoxal
C0034338
methylglyoxal