babel -H
Open Babel 1.100.1 -- Jul 27 2003 -- 19:41:53
Usage: babel [-i]  [-o] 

Currently supported input types
        alc -- Alchemy file
        prep -- Amber PREP file
        bs -- Ball & Stick file
        caccrt -- Cacao Cartesian file
        ccc -- CCC file
        c3d1 -- Chem3D Cartesian 1 file
        c3d2 -- Chem3D Cartesian 2 file
        cml -- Chemical Markup Language file
        box -- Dock 3.5 Box file
        dmol -- DMol3 Coordinates file
        feat -- Feature file
        gam -- GAMESS Output file
        gamout -- GAMESS Output file
        gpr -- Ghemical Project file
        mm1gp -- Ghemical MM file
        qm1gp -- Ghemical QM file
        hin -- HyperChem HIN file
        jout -- Jaguar Output file
        bin -- OpenEye Binary file
        mmd -- MacroModel file
        mmod -- MacroModel file
        out -- MacroModel file
        dat -- MacroModel file
        car -- MSI Biosym/Insight II CAR file
        sdf -- MDL Isis SDF file
        sd -- MDL Isis SDF file
        mdl -- MDL Molfile file
        mol -- MDL Molfile file
        mopcrt -- MOPAC Cartesian file
        mopout -- MOPAC Output file
        mmads -- MMADS file
        mpqc -- MPQC file
        bgf -- MSI BGF file
        nwo -- NWChem Output file
        pdb -- PDB file
        ent -- PDB file
        qcout -- Q-Chem Output file
        res -- ShelX file
        smi -- SMILES file
        mol2 -- Sybyl Mol2 file
        unixyz -- UniChem XYZ file
        vmol -- ViewMol file
        xyz -- XYZ file

Currently supported output types
        alc -- Alchemy file
        bs -- Ball & Stick file
        caccrt -- Cacao Cartesian file
        cacint -- Cacao Internal file
        cache -- CAChe MolStruct file
        c3d1 -- Chem3D Cartesian 1 file
        c3d2 -- Chem3D Cartesian 2 file
        ct -- ChemDraw Connection Table file
        cml -- Chemical Markup Language file
        cssr -- CSD CSSR file
        box -- Dock 3.5 Box file
        dmol -- DMol3 Coordinates file
        feat -- Feature file
        fh -- Fenske-Hall Z-Matrix file
        gamin -- GAMESS Input file
        inp -- GAMESS Input file
        gcart -- Gaussian Cartesian file
        gau -- Gaussian Input file
        gpr -- Ghemical Project file
        gr96a -- GROMOS96 (A) file
        gr96n -- GROMOS96 (nm) file
        hin -- HyperChem HIN file
        jin -- Jaguar Input file
        bin -- OpenEye Binary file
        mmd -- MacroModel file
        mmod -- MacroModel file
        out -- MacroModel file
        dat -- MacroModel file
        sdf -- MDL Isis SDF file
        sd -- MDL Isis SDF file
        mdl -- MDL Molfile file
        mol -- MDL Molfile file
        mopcrt -- MOPAC Cartesian file
        mmads -- MMADS file
        bgf -- MSI BGF file
        csr -- MSI Quanta CSR file
        nw -- NWChem Input file
        pdb -- PDB file
        ent -- PDB file
        pov -- POV-Ray Output file
        report -- Report file
        qcin -- Q-Chem Input file
        smi -- SMILES file
        fix -- SMILES Fix file
        mol2 -- Sybyl Mol2 file
        txyz -- Tinker XYZ file
        txt -- Titles file
        unixyz -- UniChem XYZ file
        vmol -- ViewMol file
        xed -- XED file
        xyz -- XYZ file
        zin -- ZINDO Input file
Additional options : 
 -f <#> Start import at molecule # specified 
 -l <#> End import at molecule # specified 
 -d Delete Hydrogens 
 -h Add Hydrogens 
 -hpH Add Hydrogens appropriate for pH (use transforms in phmodel.txt) 
 -c Center Coordinates 
 -x[flags] XML.CML options (e.g. -x1ac)  
   1 output CML V1.0 (default)
   2 output CML V2.0 (Schema)
   a output array format for atoms and bonds (default )
   p prettyprint output (default no indent)
   n output namespace (default no namespace)
   c use 'cml' as output namespace prefix (else default) (forces n)
   d output DOCTYPE (default none)
   g debug output