14289-34-0 L,L-2,6-diaminoheptanedioate L,L-2,6-diaminopimelate L,L-A2pm L,L-DAP L,L-diaminopimelate LL-2,6-diaminoheptanedioate LL-2,6-diaminopimelate LL-A2pm LL-DIAMINOPIMELATE