Publication Date:
2011-09-16
Description:
Three new 3(4),9(10)-disecocycloartane peroxy triterpene lactones, named as pseudolarolides Q 2 , T 1 , and T 2 ( 1 – 3 , resp.), along with five known triterpenoids, were isolated from the seeds of Pseudolarix kaempferi Gord . Their structures were elucidated to be (9 R ,10 R ,16 R ,23 R ,25 R )-16,23-epoxy-9,10-epidioxy-3,4:9,10-disecocycloart-1(2)-ene-3,4:26,23-diolide ( 1 ), (1 R ,9 R ,10 S ,16 R ,23 S ,25 R )-1,4:16,23-diepoxy-9,10-epidioxy-3,4;9,10-disecocycloartan-26(23)-olid-3-oic acid methyl ester ( 2 ), and (1 R ,9 R ,10 S ,16 R ,23 R ,25 R )-1,4:16,23-diepoxy-9,10-epidioxy-3,4;9,10-disecocycloartan-26(23)-olid-3-oic acid methyl ester ( 3 ) on the basis of spectroscopic analysis.
Print ISSN:
0018-019X
Electronic ISSN:
1522-2675
Topics:
Chemistry and Pharmacology
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