Table 1.  .

The structures of naphthoquinone derivatives (1-17). R1, R2, R3 and R4 in Fig. 1c

COMPOUND	R1	R2	R3	R4
1	H	H	H	H
2		H	H	H
3		H	H	H
4		H	H	H
5		H	H	H
6			H	H
7		H	H	H
8		H	H	H
9		H	H	H
10			H	H
11		H	H	H
12			OH	H
13	H	H	H	OH
14		H	OH	H
15		H	H	OH
16		H	H	H
17		H	H	H