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QS-21

CAT: 1568-C18307-25mgSize: 25 mgDry Ice: NoHazardous: No
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CAT#:1568-C18307-25mgSize:25 mg
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CAS Number
141256-04-4
Target
Immunology & Inflammation related
Applications
Immunology & Inflammation
Molecular Formula
C92H148O46
Additionnal Information
QS-21 (QS-21-Api; Stimulon) is a natural saponin vaccine adjuvant derived from Quillaja saponaria bark that enhances both Th2 humoral and Th1 cell-mediated immune responses by acting on antigen-presenting cells (APCs) and T cells. It activates the NLRP3 inflammasome, leading to caspase-1-dependent release of IL-1β and IL-18 cytokines, which are critical for Th1 immunity and control of intracellular pathogens.

Chemical Information

qs-21-apiose isomer

QS-21 is an investigational adjuvant, which is a substance added to vaccines and other immunotherapies that is designed to enhance the body’s immune response to the antigen contained within the treatment. It is the leading member of the Stimulon family of adjuvants. As a vaccine additive, it is currently being evaluated in clinical trials in a variety of disease areas by Antigenics.

CAS Number141256-04-4
PubChem CID73652135
IUPAC Name(2S,3S,4S,5R,6R)-6-[[(3S,4S,4aR,6aR,6bS,8R,8aR,12aS,14aR,14bR)-8a-[(2S,3R,4S,5R,6R)-3-[(2S,3R,4S,5R,6S)-5-[(2S,3R,4S,5R)-4-[(2S,3R,4R)-3,4-dihydroxy-4-(hydroxymethyl)oxolan-2-yl]oxy-3,5-dihydroxyoxan-2-yl]oxy-3,4-dihydroxy-6-methyloxan-2-yl]oxy-5-[(3S,5S,6S)-5-[(3S,5S,6S)-5-[(2R,3R,4R,5S)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-3-hydroxy-6-methyloctanoyl]oxy-3-hydroxy-6-methyloctanoyl]oxy-4-hydroxy-6-methyloxan-2-yl]oxycarbonyl-4-formyl-8-hydroxy-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-3-hydroxy-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4-[(2S,3R,4S,5R)-3,4,5-trihydroxyoxan-2-yl]oxyoxane-2-carboxylic acid
Molecular FormulaC92H148O46
Molecular Weight1990.1
XLogP-2.4
Topological Polar Surface Area717
Hydrogen Bond Donor Count23
Hydrogen Bond Acceptor Count46
Rotatable Bond Count38
Heavy Atom Count138
Formal Charge0
Complexity4100
SMILES
CC[C@H](C)[C@H](C[C@@H](CC(=O)O[C@@H](C[C@@H](CC(=O)O[C@H]1[C@H](O[C@H]([C@@H]([C@H]1O)O[C@H]2[C@@H]([C@@H]([C@H]([C@@H](O2)C)O[C@H]3[C@@H]([C@H]([C@@H](CO3)O)O[C@H]4[C@@H]([C@](CO4)(CO)O)O)O)O)O)OC(=O)[C@]56CCC(C[C@H]5C7=CC[C@@H]8[C@]9(CC[C@@H]([C@@]([C@@H]9CC[C@]8([C@@]7(C[C@H]6O)C)C)(C)C=O)O[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1)C(=O)O)O)O[C@H]1[C@@H]([C@H]([C@@H](CO1)O)O)O)O[C@H]1[C@@H]([C@H]([C@H]([C@H](O1)CO)O)O)O)C)(C)C)C)O)[C@@H](C)CC)O)O[C@H]1[C@@H]([C@H]([C@@H](O1)CO)O)O
InChI
InChI=1S/C92H148O46/c1-13-36(3)46(126-54(102)25-41(98)24-47(37(4)14-2)127-80-62(110)58(106)49(30-94)128-80)23-40(97)26-55(103)131-69-39(6)125-82(73(65(69)113)136-79-64(112)60(108)68(38(5)124-79)132-78-67(115)70(45(100)32-122-78)133-84-75(116)91(120,34-96)35-123-84)138-85(119)92-22-21-86(7,8)27-43(92)42-15-16-51-87(9)19-18-53(88(10,33-95)50(87)17-20-89(51,11)90(42,12)28-52(92)101)130-83-74(137-81-63(111)59(107)57(105)48(29-93)129-81)71(66(114)72(135-83)76(117)118)134-77-61(109)56(104)44(99)31-121-77/h15,33,36-41,43-53,56-75,77-84,93-94,96-101,104-116,120H,13-14,16-32,34-35H2,1-12H3,(H,117,118)/t36-,37-,38-,39+,40-,41-,43-,44+,45+,46-,47-,48+,49-,50+,51+,52+,53-,56-,57-,58-,59-,60-,61+,62+,63+,64+,65-,66-,67+,68-,69-,70-,71-,72-,73+,74+,75-,77-,78-,79-,80+,81-,82-,83+,84-,87-,88-,89+,90+,91+,92+/m0/s1
InChIKey
DRHZYJAUECRAJM-DWSYSWFDSA-N
Chemical Structure
2D Structure
2D structure of qs-21-apiose isomer
CAS: 141256-04-4
CID: 73652135
Formula: C92H148O46
MW: 1990.1
Interactive 3D Structure
Loading 3D structure...
View on PubChemRaw 3D data
Computed Properties
PropertyValue
Molecular Weight1990.1
XLogP3-2.4
Hydrogen Bond Donor Count23
Hydrogen Bond Acceptor Count46
Rotatable Bond Count38
Exact Mass1988.9241772
Monoisotopic Mass1988.9241772
Topological Polar Surface Area717 Ų
Heavy Atom Count138
Formal Charge0
Complexity4100
Isotope Atom Count0
Defined Atom Stereocenter Count51
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently-Bonded Unit Count1
Compound Is CanonicalizedYes

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