Synthesis and Pharmacological Activities of Pyrano[2,3-d]pyrimidine and Pyrano[2,3-d]pyrimidine-5-one Derivatives as New Fused Heterocyclic Systems

Table 1

The antioxidant activities of the synthesized compounds.

Compound number	Antioxidant activity		Bleomycin dependent DNA damage
	Absorbance	Inhibition %
1	0.111	78.6	0.098
2	0.427	17.9	0.127
3	0.419	19.4	0.135
4	0.062	88.1	0.083
5	0.393	24.4	0.138
7a	0.083	84.0	0.091
7b	0.428	17.7	0.151
8	0.274	47.3	0.089
9	0.446	14.2	0.142
10	0.060	88.5	0.066
11	0.355	31.7	0.112
Ascorbic acid	0.065	89.2	0.076
ABTS	0.520	—	—