Figure 2.
Naringenin oxime and its derivatives. Naringenin oxime: R1=H, R2=H, R3=H (9); 5,7,4′-tri-O-methylnaringenin oxime: R1=CH3, R2=CH3, R3=CH3 (10); 5,7,4′-tri-O-ethylnaringenin oxime: R1=CH3CH2, R2=CH3CH2, R3=CH3CH2 (11); 7-O-ethylnaringenin oxime: R1=CH3CH2, R2=H, R3=H (12); 7-O-pentylnaringenin oxime: R1=CH3(CH2)4, R2=H, R3=H (13); 7,4′-di-O-ethylnaringenin oxime: R1=CH3CH2, R2=H, R3=CH3CH2 (14); 7,4′-di-O-methylnaringenin oxime: R1=CH3, R2=H, R3=CH3 (15); 7-O-methylnaringenin oxime: R1=CH3, R2=H, R3=H (16); 7,4′-di-O-pentylnaringenin oxime: R1=CH3(CH2)4, R2=H, R3=CH3(CH2)4 (17).
