N,N'-(4,4'-methanediyl-diphenyl)-biscarbamic acid bis(2,4-di-tert-amylphenyl) ester

N,N'-bis-(9,10-dioxo-9,10-dihydro-[2]anthryl)-urea

1-benzyl-2',3'-dihydro-2'-oxospiro-[piperidine-4,4'(1'H)-quinazoline]