N,N,N''-Triethyl-N''-[5-(N-succinimidyloxycarbonyl)-pentyl]-9-cyanopyronine c 9-CYANO-N,N,N'-TRIETHYLPYRONINE-N'-CAPROIC ACID N-HYDROXYSUCCINIMIDE ESTER CHLORIDE NIR-1 NIR-667 N-SUCCINIMIDYL ESTER 9-CYANO-N,N,N'-TRIETHYLPYRONINE-N'-CAPRO IC ACID N- 9-Cyano-N,N,N'-triethylpyronine-N'-caproic acid N-hydroxysuccinimide ester chloride >=85% (HPLC)