Pending MIME types (obsolete? or not included)

x-mdl-isis (*.skc)
x-smd (*.smd)
x-synopsys-accord (*.acc)
x-msi-molfile (*.msm)
x-ct (*.ct)
x-mopac-den (??)
x-mopac-esp (*.esp, *.ESP)
x-questel-f1 (*.f1d)
x-questel-f1-query (*.f1q)
x-eye2eye
x-pdb-ribbon
