Linked Life Data

9392879

Source:http://linkedlifedata.com/resource/pubmed/id/9392879

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1998-2-3
pubmed:abstractText
Treatment of cumingianosides and cumindysoside A, which possess a 14,18-cycloapotirucallane skeleton, with p-toluenesulfonic acid in CH2Cl2 yielded new triterpene glucosides. Cumingianoside A (1) gave 10 and 11, along with cumingianoside Q (5). The structures of 10 and 11 were determined on the basis of spectral examination and contained a dammar-13(17)-ene and a 17(R),23(R)-epoxydammarane skeleton, respectively. Cumingianoside C (2) afforded, together with cumingianoside P (6), products 12 and 13, which were similar to 10 and 11, respectively. With a short reaction time at room temperature, cumingianoside E (3) yielded cumingianoside D (4). In contrast, when 3 was treated with p-toluenesulfonic acid in CH2Cl2 overnight at 5 degrees C, it gave two products, 9 and 14. Extensive spectroscopic examination revealed that 9 possessed a dammar-12-ene skeleton, while 14 was a pentacyclic tetranortriterpene glucoside with a novel skeleton. Cumindysoside A (8) gave a product (15) similar to 14. The cytotoxicities of 9-15 were evaluated against a panel of 58 human tumor cell lines. Compounds 11-15 exhibited potent cytotoxicity with log GI50 values ranging from -7.11 to -4.94, especially against leukemia and colon-tumor cell lines.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0163-3864
pubmed:author
pubmed:issnType
Print
pubmed:volume
60
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1105-14
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Antitumor agents. 180. Chemical Studies and cytotoxic evaluation of cumingianosides and cumindysoside A, antileukemic triterpene glucosides with a 14,18-cycloapotirucallane skeleton.
pubmed:affiliation
Natural Products Laboratory, School of Pharmacy, University of North Carolina, Chapel Hill 27599, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.