Comp.	X	R
1	NH	C6H5–
2	NH	2-NO2–C6H4–
3	NH	4-NO2–C6H4–
4	NH	3-NO2–C6H4–
5	NH	4-Cl–C6H4–
6	NH	2-OCH3–C6H4–
7	NH	4-OH–C6H4–
8	NH	3-OH–C6H4–
9	NH	3-OCH3–C6H4–
10	NH	4-OC2H5–C6H4–
11	O	C6H5–
12	O	2-NO2–C6H4–
13	O	4-NO2–C6H4–
14	O	3-NO2–C6H4–
15	O	4-Cl–C6H4–
16	O	2-OCH3–C6H4–
17	O	4-OH–C6H4–
18	O	3-OH–C6H4–
19	O	3-OCH3–C6H4–
20	O	4-OC2H5–C6H4–