.beta.-Dinaphthylthiourea 1166-32-1 Di-2-naphthylthiourea N,N'-Bis(2-naphthyl)thiourea NSC74775 Thiourea, N,N'-di-2-naphthalenyl- Urea, 1,3-bis(2-naphthyl)-2-thio- Urea, 1,3-di-2-naphthyl-2-thio- WLN: L66J CMYUS&M- CL66J