4091 -OEChem-04030813132D 0 0 0 0 0 0 0 0 0999 V2000 M END > 4091 > 2 > KEGG > C00833 > C00833 Procollagen > C00833 > http://www.genome.jp/kegg/kegg2.html > http://www.genome.jp/dbget-bin/www_bget?cpd+C00833 $$$$