Handle chemical names better

q-m / food-ingredient-parser-ruby

Extract the structure of ingredient lists on food products

MIT License

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Handle chemical names better #19

Closed wvengen closed 3 years ago

wvengen commented 3 years ago

Some chemical names have numbers in them, these are not recognized or by the parser or wrongly parsed.

1-hydroxyethyl 4,5-diamino pyrazole sulfate
~~1,2-benzisothiazol-3~~
2,3-trimethyl-2-isopropylbutanamide
2-bromo-2-nitropropane-1,3-diol
2,3-Dihydro-1,1-dimethyl-1H-indene-ar-propanal
2-Amino-4-Hydroxyethylaminoanisole Sulfate
3-benzodioxole-5-propionaldehyde
dinatrium-5-guanylate
dinatrium-5'- ribonucleotiden
dinatrium-5’-ribonucleotiden
dinatrium uridine 5'-monofosfaat

wvengen commented 3 years ago

getting somewhere, but now natuurlijke aroma's isn't recognized anymore ...

rule chemical_systematic_name
  ( chemical_systematic_name_num dash ) ( [A-Za-z]+ dash ( chemical_systematic_name_num dash ws? 
  ( [A-Za-z]+ dash ( chemical_systematic_name_num dash ws? )? )+ [A-Za-z]+
end

rule chemical_systematic_name_num
  digit+ [RH'] /
  digit+ ( ',' digit+ )*
end

wvengen commented 3 years ago

All are parsed now, except 1,2-benzisothiazol-3 (because it ends with -3, which I wouldn't expect). This is probably parse error earlier. Chemical names don't really end with a number like that, as far as I am aware.