Table 1 Series of synthesized flavonoids from IOS

NC1

H

H

OCH₃

OCH₃

C₁₇H₁₆O₄

NC6

OCH₃

H

OCH₃

OCH₃

C₁₈H₁₈O₅

NC7

CH₂CH₃

H

OCH₃

OCH₃

C₁₉H₂₀O₄

NC5

CH₂CH₃CH₃

H

OCH₃

OCH₃

C₂₀H₂₂O₄

NC2

Br

H

OCH₃

OCH₃

C₁₇H₁₅O₄Br

NC8

H

NO₂

OCH₃

OCH₃

C₁₇H₁₅NO₆

NF2

H

H

OCH₃

OCH₃

C₁₇H₁₆O₄

NF4

CH₂CH₃

H

OCH₃

OCH₃

C₁₉H₂₀O₄

NF5

CH₂CH₃CH₃

H

OCH₃

OCH₃

C₂₀H₂₂O₄

NF7

H

NO₂

OCH₃

OCH₃

C₁₇H₁₅NO₆

NPC3 (Pinostrobin)

H

H

C₁₆H₁₄O₄

NPC5

OCH₃

H

–

–

C₁₇H₁₆O₅

NPC7

CH₂CH₃

H

–

–

C₁₈H₁₈O₄

NPC6

CH₂CH₃CH₃

H

–

–

C₁₉H₂₀O₄

NPC4

Br

H

–

–

C₁₆H₁₃O₄Br

NPC8

H

NO₂

–

–

C₁₆H₁₃NO₆

NP4 (Pinocembrin)

H

H

–

–

C₁₅H₁₂O₄

NP5

OCH₃

H

–

–

C₁₆H₁₄O₅

NP6

CH₂CH₃CH₃

H

–

–

C₁₈H₁₈O₄

NP9

CH₂CH₃

H

–

–

C₁₇H₁₆O₄

NP7

Br

H

–

–

C₁₅H₁₁O₄Br