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Table 1 The structures of glycyrrhetinic acid hybrids 1a–9a

From: Design, synthesis, and biological evaluation of the novel glycyrrhetinic acid-cinnamoyl hybrids as anti-tumor agents

No.

R1

R2

R3

R4

1a

H

H

H

H

2a

H

H

CH3

H

3a

OCH3

H

H

H

4a

H

OCH3

H

H

5a

H

H

OCH3

H

6a

OCH3

OCH3

H

H

7a

OCH3

H

H

OCH3

8a

OCH3

OCH3

OCH3

H

9a

H

OCH3

OCH3

OCH3