Patent ID: 8426597

Claim:
A compound of formula 1 wherein A is —(C═O) a —(CH 2 ) b —O—NO 2 ; —(C═O)—(CH 2 OCH 2 ) c CH 2 —O—NO 2 ; —(CH 2 CH 2 O) c CH 2 CH 2 —O—NO 2 ; or —(C═O) a —(CH 2 ) d —CH[(CH 2 ) e —O—NO 2 ] 2 ; —(C═O)—NR 1 —(CH 2 ) b —O—NO 2 ; —(C═O)—O—(CH 2 ) b —O—NO 2 ; —CH 2 O—(C═O)—NR 1 —(CH 2 ) b —O—NO 2 ; —CH 2 O—(C═O)—O—(CH 2 ) b —O—NO 2 ; or —CH 2 O—(C═O)—(CH 2 ) b —O—NO 2 ; and a is 0 or 1; b is between 1 and 10; c is 1, 2 or 3; d is 0, 1 or 2; e is between 1 and 4; and R 1 is H, C 1-4 -alkyl or —CH 2 O—(C═O)—NH—(CH 2 ) b —O—NO 2 ; and such compounds wherein —O—NO 2 is replaced by wherein R 2 and R 3 are both ethyl or 2-aminoethyl, or NR 2 R 3 together represent pyrrolidine, piperidine, piperazine or 4-methylpiperazine.