TABLE 3.

Chemical structures of triterpenes isolated from PVL─Part III.

	Groups	R1	R2	R3
	(45) 2α,3α,24-trihydroxyursa-12,20 (30)-dien-28-oic acid	CH2OH	CH3	CH2
	(49) 2α,3α,24-trihydroxyolean-12-en-28oic acid	CH2OH	H	CH3CH2CH3
	(51) 2α,3α,24-trihydroxy-12-en-28-ursolic acid	CH2OH	CH3	CH3CH3
	(61) 2α,3β-dihydroxy-12-en-28-ursolic acid	H	H	CH3CH2CH3
(Wang et al.)	(62) 2α,3β-dihydroxy-12-en-28-oleanolic acid)	H	CH3	CH3CH3