Table 3.

Structures of previously synthesized compounds 16–33.

Comp.	R1	R2	Comp.	R1	R2	Comp.	R1	R2
16	CHO	OH	22		OCH3	28		OCH3
17	CH2OH	OCH3	23		OCH3	29		OH
18		OCH3	24		OCH3	30		OH
19		OCH3	25		OCH3	31		OH
20		OCH3	26		OCH3	32		OH
21		OCH3	27		OCH3	33		OH