Structure elucidation and complete NMR spectral assignments of glucosylated saponins of cantalasaponin I.
Five new glucosylated steroidal glycosides, cantalasaponin I-B(1) (1), I-B(2) (2), I-B(3) (3), I-B(4) (4) and I-B(5) (5), were isolated and purified from the transformed product of the cantalasaponin I by using Toruzyme 3.0 l as biocatalyst. Their structures were elucidated on the basis of high-resolution electrospray ionization mass spectrometry, one-dimensional ((1) H and (13) C NMR) and two-dimensional [COSY, heteronuclear single-quantum correlation (HSQC), HMBC and HSQC-TOCSY] NMR spectral analyses and chemical evidence.
Beijing Institute of Radiation Medicine, Beijing, China.
Li-ping
LP
Kang
Yong-ze
YZ
Wang
Bing
B
Feng
Hong-zhi
HZ
Huang
Wen-bin
WB
Zhou
Yang
Y
Zhao
Cheng-qi
CQ
Xiong
Da-wei
DW
Tan
Xin-Bo
XB
Song
Bai-ping
BP
Ma
D055162:Biocatalysis; D005964:Glucosyltransferases / Q000737:chemistry / Q000378:metabolism; D006031:Glycosylation; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D015394:Molecular Structure; D012015:Reference Standards; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism
D012503:Saponins; D005964:Glucosyltransferases; C019963:cyclomaltodextrin glucanotransferase