Table 1.

Flavonoids identified in propolis since 2000.

No.	Chemical Name	Geographical Location	Reference
Flavones
1	Luteolin	China	[33]
2	6-Cinnamylchrysin	China	[34]
3	3',5-Dihydroxy-4',7-dimenthoxy flavone	Poland	[26]
4	Hexamethoxy flavone	Egypt	[35]
5	(7''R)-8-[1-(4'-Hydroxy-3'-methoxyphenyl) prop-2-en-1-yl]chrysin	Mexico	[36]
Flavonols
6	2'-(8"-Hydroxy-3",8"-dimethyl-oct-2"-enyl)-quercetin	Solomon Island	[31]
7	8-(8"-Hydroxy-3",8"-dimethyl-oct-2"-enyl)-quercetin	Solomon Island	[31]
8	2'-Geranylquercetin	Solomon Island	[31]
9	Macarangin	Kenya	[37]
10	(7"R)-8-[1-(4'-Hydroxy-3'-methoxyphenyl)prop-2-en-1-yl]-galangin	Mexico	[36]
Flavanones
11	3-O-[(S)-2-Methylbutyroyl]pinobanksin	China	[34]
12	(2S)-5,7-Dihydroxy-4'-methoxy-8-prenylflavanone	Solomon Island	[31]
13	Hesperitin-5,7-dimethyl ether	Portugal	[38]
14	Pinobanksin-5-methyl-ether-3-O-pentanoate	Portugal	[38]
15	7-O-Prenylstrobopinin	Greek	[39]
16	7-O-Prenylpinocembrin	Greek	[39]
17	(2R,3R)-3,5-Dihydroxy-7-methoxyflavanone 3-(2-methyl)-butyrate	Mexico	[36]
18	(2R,3R)-6[1-(4'-Hydroxy-3'-methoxyphenyl) prop-2en-1-yl] pinobanksin	Mexico	[40]
19	(2R,3R)-6[1-(4'-Hydroxy-3'-methoxyphenyl) prop-2en-1-yl]-pinobanksin-3-acetate	Mexico	[40]
20	3',4',6-Trihydroxy-7-methoxy flavanone	Nepal	[41]
21	5,7,3',4'-Tetrahydroxy-5'-C-geranylflavanone	Japan	[42]
22	5,7,3',4'-Tetrahydroxy-6-C-geranylflavanone	Japan	[42]
23	5,7,3',4'-Tetrahydroxy-2'-C-geranylflavanone	Japan	[42]
24	5,7,3',4'-Tetrahydroxy-2'-C-geranyl-6-prenlyflavanone	Japan	[42]
25	Propolin A	Taiwan	[43]
26	Propolin B	Taiwan	[43]
27	Propolin E	Taiwan	[43]
28	Sigmoidin B	Taiwan	[43]
29	Bonannione A	Taiwan	[31]
30	Solophenol A	Solomon Island	[31]
31	Sophoraflavanone A	Solomon Island	[31]
32	(2S)-7-Hydroxyflavanone	Brazil	[44]
33	(2S)-Liquiritigenin	Brazil	[44]
34	(2S)-7-Hydroxy-6-methoxyflavanone	Brazil	[44]
35	(2S)-Naringenin	Brazil	[44]
36	(2S)-Dihydrobaicalein	Brazil	[44]
37	(2S)-Dihydrooroxylin A	Brazil	[44]
38	(2R,3R)-3,7-Dihydroxyflavanone	Brazil	[44]
39	Garbanzol	Brazil	[44]
40	(2R,3R)-3,7-Dihydroxy-6-methoxyflavanone	Brazil	[44]
41	Alnustinol	Brazil	[44]
42	(2R, 3R)-3,6,7-Trihydroxyflavanone	Nepal	[41]
43	5-Methoxy-3-hidroxyflavanone	Portugal	[38]
44	5,7-Dihydroxy-6-methoxy-2,3-Dihydroflavonol-3-acetate	Australia	[45]
Isoflavones
45	Odoratin	Nepal	[41]
46	7,3',4'-Trihydroxy-5'-methoxyisoflavonoid	Nepal	[41]
47	6,7,3'-Trihydroxy-4'-methoxyisoflavonoid	Nepal	[41]
48	7,3'-Dihydroxy-6,5'- methoxyisoflavonoid	Nepal	[41]
49	7-Hydroxy-4'-methoxyisoflavonoid	Cuba	[46]
50	5,7-Dihydroxy-4'-methoxyisoflavonoid	Cuba	[46]
51	Calycosin	Brazil	[44]
52	7,4'-Dihydroxyisoflavone	Brazil	[24]
53	Homopterocarpin	Brazil	[24]
54	Medicarpin	Brazil	[24]
55	4',7-Dimethoxy-2'-isoflavonol	Brazil	[24]
Isodihydroflavones
56	Daidzein	Brazil	[44]
57	Formononetin	Brazil	[44]
58	Xenognosin B	Brazil	[44]
59	Biochanin A	Brazil	[44]
60	Pratensein	Brazil	[44]
61	2'-Hydroxybiochanin A	Brazil	[44]
62	(3S)-Vestitone-	Brazil	[44]
63	(3S)-Violanone	Brazil	[44]
64	(3S)-Ferreirin	Brazil	[44]
65	(3R)-4'-Methoxy-2',3,7-trihydroxyisoflavanone	Brazil	[44]
66	Biochanin	Cuba	[25]
Chalcones
67	3,4,2',3'-Tetrahydroxychalcone	Brazil	[30]
68	Isoliquiritigenin	Brazil	[44]
69	4,4'-Dihydroxy-2'-methoxychalcone	Brazil	[44]
Dihydrochalcones
70	(αS)-α,2',4,4'-Tetrahydroxydihydrochalcone	Brazil	[44]
71	2',4'-Dihydroxychalcone	Brazil	[44]
72	2',6'-Dihydroxy-4',4-dimethoxydihydrochalcone	Canada	[47]
73	2',4',6'-Trihydroxy-4-methoxydihydrochalcone	Canada	[47]
74	2',6',4-Tryhydroxy-4'-methoxydihydrochalcone	Canada	[47]
Flavans
75	8-[(E)-4-Phenylprop-2-en-1-one]-(2R,3S)-2-(3,5-dihydroxyphenyl)-3,4-dihydro-2H-2-be-nzopyran-5-methoxyl-3,7-diol,	China	[48]
76	8-[(E)-4-Phenylprop-2-en-1-one]-(2S,3R)-2-(3,5-dihydroxyphenyl)-3,4-dihydro-2H-2-benzopyran-5-methoxyl-3,7-diol	China	[48]
77	8-[(E)-4-Phenylprop-2-en-1-one]-(2R,3S)-2-(3-methoxyl-4-hydroxyphenyl)-3,4-dihydro-2H-2-benzopyran-5-methoxyl-3,7-diol	China	[48]
78	3-Hydroxy-5,6-dimethoxyflavan	Mexico	[49]
Isoflavans
79	(3S)-Vestitol	Brazil	[44]
80	(3S)-Isovestitol	Brazil	[44]
81	(3S)-7-O-Methylvestitol	Brazil	[44]
82	(3S)-Mucronulatol	Brazil	[44]
83	7,4'-Dihydroxy-2'-methoxyisoflavone	Cuba	[46]
84	Neovestitol	Cuba	[25]
Pterocarpins (a type of neoflavonoid)
85	Medicarpin	Cuba	[46]
86	4-Hydroxymedicarpin	-	[46]
87	Homopterocarpin	Cuba	[46]
88	4'-Methoxy-5'hydroxyvesticarpan	-	[46]
89	3,8-Dihydroxy-9-methoxypterocarpan	Cuba	[46]
90	3-Hydroxy-8,9-dimethoxypterocarpan	Cuba	[46]
91	3,4-Dihydroxy-9-methoxypterocarpan	Cuba	[46]
92	3,10-Dihydroxy-9-methoxypterocarpan	Brazil	[44]
93	6a-Ethoxymedicarpin	Brazil	[44]
94	(6aR,11aR)-4-Methoxymedicarpin	Brazil	[44]
Open-chain neoflavonoids
95	Neoflavonoid 1	Nepal	[50]
96	Neoflavonoid 2	Nepal	[50]
97	Neoflavonoid 3	Nepal	[50]
98	Neoflavonoid 4	Nepal	[50]
99	Neoflavonoid 5	Nepal	[50]
100	Neoflavonoid 6	Nepal	[50]
101	Neoflavonoid 7	Nepal	[50]
102	Neoflavonoid 8	Nepal	[50]
103	Neoflavonoid 9	Nepal	[50]
104	Neoflavonoid 10	Nepal	[50]
105	(S)-3'-hydroxy-4-methoxydalbergione	Nepal	[51]
106	(S)-3',4'-dihydroxy-4-methoxydalbergione	Nepal	[51]
107	(S)-4-methoxydalbergione	Nepal	[51]
Other flavonoids
108	2,6-Dihydroxy-2-[(4-hydroxyphenyl)methyl]-3-benzofuranone	Brazil	[44]
109	2-(2',4'-Dihydroxyphenyl)-3-methyl-6-methoxybenzofuran	Brazil	[44]
110	1-(3',4'-Dihydroxy-2'-methoxyphenyl)-3-(phenyl)propane	Mexico	[49]
111	(Z)-1-(2'-Methoxy-4',5'dihydroxyphenyl)-2-(3-phenyl)propene	Mexico	[49]