Butane, n- http://gmd-dev.mpimp-golm.mpg.de/search.aspx?query=25903e76-2345-41a4-bcbb-f5baef0fb718 4 3 0 0 0 1 V2000 0.0000 0.0000 0.0000 C 0 0 0 0 0 0 0 0 0 0.8704 0.4608 0.0000 C 0 0 0 0 0 0 0 0 0 1.7408 0.0000 0.0000 C 0 0 0 0 0 0 0 0 0 2.6623 0.4608 0.0000 C 0 0 0 0 0 0 0 0 0 1 2 1 0 0 0 2 3 1 0 0 0 3 4 1 0 0 0 M END