Details

Autor(en) / Beteiligte

• Liu, W
• Ji, Z-Q
• Wei, S-P
• Wu, W-J

Titel

Studies on the Stability of Celangulins in Water and the Structures of the Hydrolysates

Ist Teil von

• Nongyaoxue xuebao, 2009-01, Vol.11 (3), p.335-340

Erscheinungsjahr

2009

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The stability of the botanical insecticidal components Celangulin V, Celangulin I, NW 28 and NW 53 in three buffer solutions with different pH values at 54 degree C plus or minus 1 degree C it for 24h was studied by high performance liquid chromatography. Celangulin V, Celangulin I and NW 53 were more stable in pH 4 buffer solution, while NW 28 was less stable, the hydrolysis rates of them were 5.03%, 4.15%, 6.60% and 19.75%, respectively. The stability of four tested compounds in pH 7 buffer solution exhibited similar trend with that of above metioned, and their hydrolysis rates were 6.43%, 12.50%, 12.03% and 50.55%, respectively. Whereas in pH 10 buffer solution, all tested components were hydrolyzed easily, and their hydrolysis rates were 71.53%, 84.55%, 77.68% and 99.30%, respectively. The hydrolysates of Celanlulin V were also investigated by means of HPLC-ESI-MS/MS. The results showed that the main hydrolysates were produced from the break of varies ester bonds substituted at C-l, C-2, C-8 and C-9 of th