Table 2.

Group of chalcone analogues with ring A as thiophene/furan/pyridine/phenyl moieties.

No.	Chalcone Structure	Ring A	Ring B				Ref.
		X	R1	R2	R3	R4
10		S	H	H	Cl	H	[32]
11		S	OH	H	H	H	[33]
12		S	H	H	N(CH3)2	H	[33]
13		S	H	OCH3	OCH3	OCH3	[33]
14		O	H	OCH3	OCH3	OCH3	[33]
15		O	H	H	N(CH3)2	H	[33]
16		R′: H; X: N	H	OCH3	OCH3	OCH3	[33]
17 *		R′: H; X: C-OH	3-pyridyl				[34]
18 *		R′: H; X: C-OH	2-pyridyl				[34]
19 *		R′:OCH3; X: C-OH	3-pyridyl				[34]
20 *		R′:OCH3;X: C-OH	2-pyridyl				[34]

*: known compounds but their spectra data was not available.