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Table 2 The structures of glycyrrhetinic acid hybrids 1b–4b

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

No.

R1

R2

R3

R4

1b

H

H

H

H

2b

OCH3

OCH3

H

H

3b

OCH3

OCH3

OCH3

H

4b

H

OCH3

OCH3

OCH3