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. 2019 Feb 14;24(4):679. doi: 10.3390/molecules24040679

Figure 1.

Figure 1

Synthesis of novel O-alkyl derivatives 7a–13a and 16a–17a and their oximes 7b–13b and 16b–17b; Reaction conditions: (I) alkyl iodide, (CH3)2CO or DMF, K2CO3, 40–45 °C, 40–96 h; (II) NH2OH·HCl, CH3COONa, EtOH, 40–50 °C, 24–96 h.