Table 1.

Inhibition data of compounds 9–16 [45].

Compound	IC50 (µg/mL) a
	hCA I	hCA II
Benzoic acid (9)	1.31	1.12
m-hydroxybenzoic acid (10)	1.33	1.00
Propylparaben (11)	0.84	0.82
Protocatechuic acid (12)	1.31	1.15
Vanillic acid (13)	0.52	0.36
o-coumaric acid (14)	0.93	0.22
trans-cinnamic (15)	0.11	0.09
Chlorogenic acid (16)	0.98	0.88

^a From three different assays, errors ± 5%–10% of the reported value.