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1st class
FL1 Aurone and Chalcone	FL2 Flavanone	FL3 Flavone
1st class FL1 FL2 FL3 Aurone and Chalcone Flavanone Flavone 2nd Class FL1A Aurone FL1B Chalcone FL1C Chalcone FL1D Dihydrochalcone 2nd Class FL2F Flavanone 2nd Class FL3F Flavone FL4 Dihydroflavonol FL5 Flavonol FL6 Flavan 2nd Class FL4D Dihydroflavonol 2nd Class FL5F Flavonol 2nd Class FL6F Flavan FL63 Flavan 3-ol FL64 Flavan 4-ol FL6D Flavan 3,4-diol FL7 Anthocyanin FLI Isoflavonoid FLN Neoflavonoid 2nd Class FL7A Anthocyanin FL7D 3-Desoxyanthocyanin 2nd Class FLIA Isoflavone FLIB Isoflavanone FLIC Isoflavan FLID Pterocarpane FLIE Coumestan FLIF Rotenoid FLIG Coumaranochromone FLIH 3-Arylcoumarin FLII 2-Arylbenzofuran FLIJ alpha-Methoxynbenzoin 2nd Class FLNA 4-Arylcoumarin FLNB 4-Arylchroman FLNC Dalbergiquinol FLND Dalbergione FLNE Neoflavene FLNF Coumarinic acid	2nd Class FL2F Flavanone	2nd Class FL3F Flavone
FL4	FL5	FL6
Dihydroflavonol	Flavonol	Flavan
2nd Class FL4D Dihydroflavonol	2nd Class FL5F Flavonol	2nd Class FL6F Flavan FL63 Flavan 3-ol FL64 Flavan 4-ol FL6D Flavan 3,4-diol
FL7	FLI	FLN
Anthocyanin	Isoflavonoid	Neoflavonoid
2nd Class FL7A Anthocyanin FL7D 3-Desoxyanthocyanin	2nd Class FLIA Isoflavone FLIB Isoflavanone FLIC Isoflavan FLID Pterocarpane FLIE Coumestan FLIF Rotenoid FLIG Coumaranochromone FLIH 3-Arylcoumarin FLII 2-Arylbenzofuran FLIJ alpha-Methoxynbenzoin	2nd Class FLNA 4-Arylcoumarin FLNB 4-Arylchroman FLNC Dalbergiquinol FLND Dalbergione FLNE Neoflavene FLNF Coumarinic acid