· 1,2-dichloropropane
· 1,3-dibromopropane
· 1,3-dichloropropane
· 1,3-dimethylurea; N,N’-dimethylurea; sym-dmethylurea
· 1-(2-hydroxyethyl) piperazine
· 1-amino-2,4-imidazolidinedionemonohydrochloride
· 1-amino-4-methylpiperazine
· 1-aminomorpholine
· 1-bromo-3-chloropropane
· 1-chloro-2,5-pyrrolidinedione; NCS
· 1-chloro-2-propanone
· 1-ethyl-2-aminomethyl pyrolidine
· 1-methyl-4-nitro-5-chloroimidazole
· 1-methyl-5-mercapto-1,2,3,4-tetrazole
· 1-methylpiperazine; methylpiperazine; N-methyl piperazine
· 1H-pyrrole
· 1H-tetrazole-acetyl chloride
· 2,3,4-trifluoroaniline
· 2,3,5-trimethylpyrazine
· 2,3-dichloropyrazine
· 2,3-dihydroxypyrazine
· 2,4,6-triaminopyrimidine
· 2,4,6-trimethylpyridine; TMP
· 2,4-(3H,5H)-imidazoledione
· 2,4-diamino-6-hydroxypyrimidine