You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Brand", "UnapprovedDrug", "Drug", "DrugGroup"].

Please return the output as a JSON object of the format: {"Brand" : ["Aspirin", ...], "DrugGroup": ["Salicyclate", ...], "Drug": ["Phenobarbital", ...], "UnapprovedDrug": ["Heroin", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

No formal drug interaction studies have been conducted with DOXIL  . Until specific compatibility data are available, it is not recommended that DOXIL  be mixed with other drugs. DOXIL  may interact with drugs known to interact with the conventional formulation of doxorubicin HCl.
{"Brand": ["DOXIL"], "Drug": ["doxorubicin HCl"], "DrugGroup": [], "UnapprovedDrug": []}