In order to analyze chemical constituents and quality standard of Guangdong Liangcha

five glycosides were isolated. Their structures were determined to be 4-

p

- cumaroyl-

D

- glucose (

1

)

2α

3α

19α-trihydroxyursa-12-en--28-oic acid β-

D-

glucopyranosyl ester (

2

)

2α

3β

19α-trihydroxyursa-12-en-28-oic acid β-

D-

glucopyranosyl ester (

3

)

2α

3β

19α

23- tetrahydroxyurs-12-en-28-oic acid β-

D-

glucopyranosyl ester (

4

)

6-C-glycopyr- anosyl luteolin (

5

) by spectroscopic analysis. Compound

1

was firstly obtained as a natural product

and compounds

1

2

3

4

5

were also firstly obtained from Guangdong Liangcha

which was contributed to further mechanism of bioactivity.