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Required column - O=optional, R=required, C=conditional (dependent on other tags)
Chiral column - N=non-chiral (one value per label); Y=chiral (value is right, semi-colon, left - ie 2.50;1.25)
...
...
Required column - O=optional, R=required, C=conditional (dependent on other tags)
Chiral column - N=non-chiral (one value per label); Y=chiral (value is right, semi-colon, left - ie 2.50;1.25)
...