Benzothiazole heptamethine cyanine dyes are capable of emitting light in the near-infrared (NIR) region of the electromagnetic spectrum. NIR light has the advantage of deeper tissue penetration, lower background autofluorescence, and reduced photodamage compared to visible light, making it well-suited for in vivo imaging.
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3-benzyl-2-[(E)-2-[(3E)-3-{2-[(2Z)-3-benzyl-2,3-dihydro-1,3-benzothiazol-2-ylidene]ethylidene}-2-chlorocyclohex-1-en-1-yl]ethenyl]-1,3-benzothiazol-3-ium bromide
2-(2-((E)-4-aminostyryl)-4H-chromen-4-ylidene)malononitrile
