Unknown or multiple predicted targets

The designation "Unknown or multiple predicted targets" is a placeholder used in pharmacological and biochemical databases to indicate that a specific molecular target for a compound has not been identified or that the compound interacts with a wide variety of targets without a primary driver. This classification is frequently encountered in phenotypic drug discovery, where a compound's efficacy is established in biological models before its protein binding partners are known (Moffat et al., 2017). It may also refer to polypharmacological agents that achieve therapeutic effects by modulating multiple pathways simultaneously, a common feature in complex diseases like cancer or neurological disorders (Anighoro et al., 2014). Because this entry does not represent a single, defined biological entity, it lacks specific molecular classifications and biological functions. For drug development, this label highlights a need for target deconvolution and further mechanistic studies to ensure safety and efficacy (Ziegler et al., 2013). This term is often used in datasets to flag entries requiring further curation or experimental validation.

Other names

UnknownMultiple targetsUnspecified targetNon-specific targetPhenotypic target

The mechanism of action is unknown or involves non-specific interactions with multiple biological molecules.