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smiles

A Schema.org Property

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.
A specification in form of a line notation for describing the structure of chemical species using short ASCII strings. Double bond stereochemistry \ indicators may need to be escaped in the string in formats where the backslash is an escape character.
Values expected to be one of these types
Text
Used on these types
MolecularEntity

Source

http://www.bioschemas.org/MolecularEntity