Figure 7.
Synthesized UA derivatives. 42–46; 42: R1 = COCH3; R2=OH; 43: R1 = COCH2CH3; R2 = OH; 44: R1 = COCH2CH2CH3; R2 = OH; 5: R1 = H; R2 = OCH3; 46: R1 = H; R2 = NHCH2CH2CH3.
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