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????B0

????B0
????B0 ??? ???
?? ??:
135575-42-7
???:
????B0
???(??):
????B0
???:
Pneumocandin B0
???(??):
CFA;Pneumocardin B0;Caspofungin PneuMocandin B0 IMpurity;CS-492;L-688786;CFA/ CBR01;CHEMBL269311;Novocontin B0;PneumocandinBo;neumocandin B0
CBNumber:
CB51120636
???:
C50H80N8O17
??? ??:
1065.21
MOL ??:
135575-42-7.mol

????B0 ??

???
>230°C (dec.)
?? ?
1442.9±65.0 °C(Predicted)
??
1.41±0.1 g/cm3(Predicted)
?? ??
Sealed in dry,Store in freezer, under -20°C
???
DMSO(?? ???), ???(?? ???)
?? ?? (pKa)
9.86±0.26(Predicted)
??? ??
??
??? ??
??? ??
??
???? ?????
?? ??(λmax)
276nm(MeOH)(lit.)
InChIKey
DQXPFAADCTZLNL-PYWTXGKPNA-N
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
HS ?? 2941.90.3000
????(GHS): GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
?? ?: Danger
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H315 ??? ??? ??? ????? ?? ????? ?? 2 ?? GHS hazard pictograms P264, P280, P302+P352, P321,P332+P313, P362
H317 ????? ?? ??? ??? ? ?? ?? ??? ?? ?? 1 ?? GHS hazard pictograms P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H318 ?? ?? ??? ??? ?? ? ?? ?? ??? ?? ?? 1 ?? GHS hazard pictograms P280, P305+P351+P338, P310
H334 ?? ? ????? ??, ?? ?? ?? ?? ?? ??? ? ?? ??? ??? ?? ?? 1 ?? GHS hazard pictograms P261, P285, P304+P341, P342+P311,P501
H335 ?? ???? ??? ? ?? ?? ???? ?? - 1? ??;???? ?? ?? 3 ?? GHS hazard pictograms
H400 ????? ?? ??? ?? ????? ?? - ?? ?? 1 ?? GHS hazard pictograms P273, P391, P501
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P272 ??? ??? ??? ??? ???? ???.
P273 ???? ???? ???.
P280 ????/???/???/?????? ?????.
P285 ??? ? ?? ?? ???? ??? ???? ?????
P302+P352 ??? ??? ??? ?? ????.
P304+P341 ???? ??,??? ??? ?? ??? ??? ??? ?? ??? ??? ???? ?? ??? ??? ??? ?
P305+P351+P338 ?? ??? ? ?? ?? ???? ????. ???? ?????? ?????. ?? ????.
P310 ?? ????(??)? ??? ????. ???? ?? ????(??)? ??? ????.
P321 (…) ??? ???.
P332+P313 ?? ??? ??? ???? ??· ??? ????.
P333+P313 ????? ?? ??? ???? ???? ??·??? ????.
P342+P311 ??? ??? ???? ????(??)? ??? ????.
P362 ??? ??? ?? ?? ?? ?????
P363 ?? ??? ??? ??? ?????.
P391 ???? ????.
P501 ...? ??? / ??? ?? ???.
NFPA 704
0
3 0

????B0 C??? ??, ??, ??

??

Pneumocandin B0 is an antifungal lipopeptide that acts by inhibiting the synthesis of β-(1,3)-D-glucan, a component of fungal cell walls (IC50s = 70 and 67 ng/ml for inhibiting glucan synthase in C. albicans and A. fumigatus, respectively). It can be used to synthesize the echinocandin caspofungin acetate .

??

Pneumocandin B0 is the major analogue of a family of lipopeptides isolated from several species of several different genera, such as Cryptosporiopsis, Glarea and Pezicula. Pneumocandin B0 is a potent antifungal and acts by inhibition of the synthesis of β-(1,3)-D-glucan, an essential component of the cell wall of susceptible fungi.

??

ChEBI: An echinocandin initially isolated as a very minor bioactive fermentation product of Glarea lozoyensis (originally known as Zalerion arboricola). Subsequent random mutagenesis work and optimisation of the fermentation medium permi ted the industrial production of pneumocandin B0, which is used as the starting point for the synthesis of the antifungal drug caspofungin.

?? ??

Pneumocandin B0, the precursor of the antifungal drug caspofungin, is a lipohexapeptide produced by the fungus Glarea lozoyensis. Oxidative stress and the resulting reactive oxygen species (ROS) are involved in regulating the biosynthesis of it. Acetyl-CoA and NADPH are major factors limiting the biosynthesis of pneumocandin B0. Other metabolites, such as pyruvate, α-ketoglutaric acid, lactate, unsaturated fatty acids, and metabolite γ-aminobutyric acid, also play an important role in the biosynthesis of pneumocandin B0 and cell growth[1-2].

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