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QSY21 NHS
| Catalog Number | A20-0030 |
| Category | QSY |
| Molecular Formula | C45H39ClN4O7S |
| Molecular Weight | 815.35 |
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Product Introduction
QSY-21 has a broad and intense absorption at ~661 nm maxima with no detectable fluorescence, making it useful as an acceptor in fluorescence resonance energy transfer (FRET) applications. It is a common long-wavelength quencher to best pair with Cy5, Alexa Fluor 647, iFluor 647 or other spectrally similar fluorescent dyes.
Chemical Information |
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| Synonyms | QXY21 NHS ester; QSY21 succinimidyl ester |
| IUPAC Name | (2,5-dioxopyrrolidin-1-yl) 1-[2-[3-(1,3-dihydroisoindol-2-ium-2-ylidene)-6-(1,3-dihydroisoindol-2-yl)xanthen-9-yl]phenyl]sulfonylpiperidine-4-carboxylate;chloride |
| Canonical SMILES | C1CN(CCC1C(=O)ON2C(=O)CCC2=O)S(=O)(=O)C3=CC=CC=C3C4=C5C=CC(=[N+]6CC7=CC=CC=C7C6)C=C5OC8=C4C=CC(=C8)N9CC1=CC=CC=C1C9.[Cl-] |
| InChI | InChI=1S/C45H39N4O7S.ClH/c50-42-17-18-43(51)49(42)56-45(52)29-19-21-48(22-20-29)57(53,54)41-12-6-5-11-38(41)44-36-15-13-34(46-25-30-7-1-2-8-31(30)26-46)23-39(36)55-40-24-35(14-16-37(40)44)47-27-32-9-3-4-10-33(32)28-47;/h1-16,23-24,29H,17-22,25-28H2;1H/q+1;/p-1 |
| InChI Key | MTVVRWVOXZSVBW-UHFFFAOYSA-M |
Applications of Fluorescent Probes & Dyes
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