concentration of compound 7 (μM)	absorbance at 450 nm		
90	0.252	0.2478	0.2478
60	0.3456	0.3543	0.3675
40	0.4693	0.5248	0.5231
20	0.7308	0.7353	0.8045
10	0.7119	0.7489	0.7897
3.33	0.8283	0.8312	0.8126
1.11	0.8519	0.8375	0.8314
positive control	0.808	0.8214	0.8449
negative control	0.1343	0.1201	0.127
