[4-(dicyanomethylidene)cyclohexa-2,5-dien-1-ylidene]cyanamide

trimethylsilyl N,N-diethylcarbamate

(2-chloro-4-cyanoimino-5-methylcyclohexa-2,5-dien-1-ylidene)cyanamide

S-trimethylsilyl ethanethioate

trimethylsilyl N-(2-trimethylsilyloxyethyl)carbamate