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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