Optional
_Optional
_Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot
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extensionAdditional content defined by implementations
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idUnique id for inter-element referencing
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isotopeApplicable for single substances that contain a radionuclide or a non-natural isotopic ratio
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modifierExtensions that cannot be ignored even if unrecognized
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molecularMolecular formula
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molecularSpecified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot
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molecularThe molecular weight or weight range (for proteins, polymers or nucleic acids)
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opticalOptical activity type
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representationMolecular structural representation
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sourceSupporting literature
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stereochemistryStereochemistry type
Molecular formula