Quick search is the default interface for the Reaxys database, and it accepts a variety of search types.
Try searching with:
Keywords or a phrase
e.g. "preparation of porphyrine" or "Suzuki coupling"
Substance name
e.g. "aspirin" or "Coumadin"
Molecular formula
e.g. "C13H18O2"
CAS # (Chemical Abstract Services Number)
e.g. "102625-70-7"
The CAS # is a unique identifier for a substance, and is used consistently across many other science databases, including SciFinder, PubChem, and SDBS.