acetoxy-7 nitro-2 naphto(2,1-b)furanne

4-(5-nitro-3-phenylthiophen-2-yl)morpholine

2-(2-nitrobenzo[e][1]benzofuran-8-yl)oxyacetic acid

8-Nitropyreno(1,2-b)furan

8-Nitropyreno(2,1-b)furan