Enumerations for _Chem_comp.Type (A closed enumeration)
`DNA linking` | enumeration_text
`DNA OH 3 prime terminus` | enumeration_text
`DNA OH 5 prime terminus` | enumeration_text
`D-peptide COOH carboxy terminus` | enumeration_text
`D-peptide linking` | enumeration_text
`D-peptide NH3 amino terminus` | enumeration_text
`D-saccharide` | enumeration_text
`D-saccharide 14 and 14 linking` | enumeration_text
`D-saccharide 14 and 16 linking` | enumeration_text
`L-peptide COOH carboxy terminus` | enumeration_text
`L-peptide linking` | enumeration_text
`L-peptide NH3 amino terminus` | enumeration_text
`L-saccharide` | enumeration_text
`L-saccharide 14 and 14 linking` | enumeration_text
`L-saccharide 14 and 16 linking` | enumeration_text
`non-polymer` | enumeration_text
`other` | enumeration_text
`RNA linking` | enumeration_text
`RNA OH 3 prime terminus` | enumeration_text
`RNA OH 5 prime terminus` | enumeration_text
`saccharide` | enumeration_text