Sata, Noriko U. et al. published their research in Tetrahedron Letters in 1999 | CAS: 194808-59-8

Di-tert-butyl butane-1,4-diylbis((2-cyanoethyl)carbamatE) (cas: 194808-59-8) belongs to nitriles. Nitrile carbon shifts are in the range of 115–125 ppm whereas in isonitriles the shifts are around 155–165 ppm. In addition, Nitriles can react with alkynes, which leads to an increase in carbon chain length (carbocyanation).Reference of 194808-59-8

Sinulamide: an H,K-ATPase inhibitor from a soft coral Sinularia sp. was written by Sata, Noriko U.;Sugano, Michihiro;Matsunaga, Shigeki;Fusetani, Nobuhiro. And the article was included in Tetrahedron Letters in 1999.Reference of 194808-59-8 The following contents are mentioned in the article:

Sinulamide (I·3Cl), a new tetraprenylated spermine derivative, has been isolated from a soft coral Sinularia sp. as an H,K-ATPase inhibitor. The structure was assigned on the basis of spectroscopic data and confirmed by a total synthesis. This study involved multiple reactions and reactants, such as Di-tert-butyl butane-1,4-diylbis((2-cyanoethyl)carbamatE) (cas: 194808-59-8Reference of 194808-59-8).

Di-tert-butyl butane-1,4-diylbis((2-cyanoethyl)carbamatE) (cas: 194808-59-8) belongs to nitriles. Nitrile carbon shifts are in the range of 115–125 ppm whereas in isonitriles the shifts are around 155–165 ppm. In addition, Nitriles can react with alkynes, which leads to an increase in carbon chain length (carbocyanation).Reference of 194808-59-8

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts