Table 1.

Inhibitory activities of compounds 16–20 and 22 with β-glycosidases from Agrobacterium sp. (β-glu/gal Abg), E. coli (β-gal E. coli) as well as with the α-galactosidase from green coffee beans (α-gal GCB).

Compound	Ki [µM] β-glu/gal Abg	Ki [µM] β-gal E. coli	Ki [µM] α-gal GCB
4	100	13	0.013a
16	13	1.3	2.6
17	1.5	0.83	2.2
18	3.8	1.1	0.49
19	0.06	0.25	7.0
20	3.0	2.4	4.3
22	6.0	0.4	2.2

^aSee reference [7].