Current MIME Types: March, 1997.

Type                         Filename extension
chemical/x-cxf                 cxf 
chemical/x-mif                 mif  
chemical/x-pdb                 pdb  
chemical/x-cif                 cif  
chemical/x-mdl-molfile         mol  
chemical/x-mdl-sdf             sdf 
chemical/x-mdl-rdf             rdf 
chemical/x-mdl-rxn             rxn
chemical/x-embl-dl-nucleotide  emb, embl 
chemical/x-genbank             gen 
chemical/ncbi-asn1-binary      val
chemical/x-gcg8-sequence       gcg
chemical/x-daylight-smiles     smi
chemical/x-rosdal              ros 
chemical/x-macromodel-input    mmd, mmod
chemical/x-mopac-input         mop
chemical/x-gaussian-input      gau
chemical/x-jcamp-dx            jdx
chemical/x-kinemage            kin

chemical/x-chemdraw            chm
chemical/x-chem3d              c3d
chemical/x-mdl-tgf             tgf 
chemical/x-csml                csml, csm
chemical/x-vmd                 vmd
chemical/x-macmolecule         mcm
chemical/x-cmdf                cmdf