Table 1.

Chemical structures of nine triterpenoids from P. guajava.

No	Chemical Name	R1	R2	R3	R4	R5
1	asiatic acid	OH	H	OH	H	CH3
2	maslinic acid	OH	H	H	CH3	H
3	corosolic acid	OH	H	H	H	CH3
4	3β-O-cis-p-coumaroyl-2α-hydroxy-olean-12-en-28-oic acid	OH	cis-p-coumaroyl	H	CH3	H
5	3β-O-cis-p-coumaroyl-2α-hydroxy-urs-12-en-28-oic acid	OH	cis-p-coumaroyl	H	H	CH3
6	3β-O-trans-p-coumaroyl-2α-hydroxy-olean-12-en-28-oic acid	OH	trans-p-coumaroyl	H	CH3	H
7	3β-O-trans-p-coumaroyl-2α-hydroxy-urs-12-en-28-oic acid	OH	trans-p-coumaroyl	H	H	CH3
8	oleanolic acid	H	H	H	CH3	H
9	ursolic acid	H	H	H	H	CH3