Uses the OPSIN API https://opsin.ch.cam.ac.uk/ to search for identifers based on the input annotation column.
Arguments
- query_column
 (character) The column name to use as the reference for searching the database e.g. "compound_name". OPSIN expect molecule names as input.
- suffix
 (character) A suffix appended to all column names in the returned result. The default is
"_opsin".- output
 (character) The value returned from the pubchem database. The default is
"cids".- ...
 Additional slots and values passed to
struct_class.
Value
A  opsin_lookup object with the following output slots:
updated | (annotation_source) The annotation_source after adding data returned by the API. | 
Inheritance
A opsin_lookup object inherits the following struct classes: opsin_lookup() ⭢ rest_api() ⭢ model() ⭢ struct_class()
References
Lowe, M. D, Corbett, T. P, Murray-Rust, Peter, Glen, C. R (2011). "Chemical Name to Structure: OPSIN, an Open ", "Source Solution." Journal of Chemical Information and Modeling, 51(3), 793-753. doi:10.1021/ci100384d https://doi.org/10.1021/ci100384d.