Formats and residue coverage
| Format | Read | Write | Automatic input detection |
|---|---|---|---|
| WURCS 2.0 | yes | yes | yes |
| IUPAC condensed | yes | yes | yes |
| IUPAC extended | yes | yes | yes |
| GLYCAM | yes | yes | yes |
| stereochemical SMILES | yes | yes | yes for ordinary SMILES |
| V3000 MOL | yes | yes | no; specify mol |
| SDF | yes | yes | no; specify sdf |
| PDB/mmCIF | extraction | no | by file/text header |
The authoritative registry contains 87 entries. The 74 non-generic entries have defined backbone chemistry and are release-gated through notation, molecular, and PDB/mmCIF recognition tests. The complete named list, WURCS UniqueRES values, aliases, and generic flags is maintained in the generated monosaccharide reference.
The 13 uncertainty-preserving entries are Hex, HexNAc, HexN, HexA,
dHex, dHexNAc, ddHex, Pen, NulO, Sia, ddNulO, Unknown, and
Assigned. They can be parsed and rendered, but molecular export fails when
it would require choosing missing stereochemistry.
Bundled corpus tables accelerate exact known conversions. The registry-derived molecular index and de-novo recognizer handle concrete residues without a corpus hit; they do not require network access at runtime.