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: ["Disease", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Naloxone", ...], "Disease" : ["Hypotensive", ...]}. 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:

Effect of nondopaminergic drugs on L-dopa-induced dyskinesias in MPTP-treated monkeys. A group of four monkeys was rendered parkinsonian with the toxin MPTP. They were then treated chronically with L-DOPA/benserazide 50/12.5 mg/kg given orally daily for 2 months. This dose produced a striking antiparkinsonian effect, but all animals manifested dyskinesia. A series of agents acting primarily on neurotransmitters other than dopamine were then tested in combination with L-DOPA to see if the dyskinetic movements would be modified. Several drugs, including clonidine, physostigmine, methysergide, 5-MDOT, propranolol, and MK-801, markedly reduced the dyskinetic movements but at the cost of a return of parkinsonian symptomatology. However, yohimbine and meperidine reduced predominantly the dyskinetic movements. Baclofen was also useful in one monkey against a more dystonic form of dyskinesia. Atropine converted the dystonic movements into chorea.
{"Chemical": ["physostigmine", "methysergide", "5-MDOT", "MK-801", "Atropine", "MPTP", "L-DOPA", "dopamine", "yohimbine", "Baclofen", "propranolol", "meperidine", "clonidine", "L-dopa", "L-DOPA/benserazide"], "Disease": ["dyskinesia", "chorea", "dyskinetic", "dyskinesias", "parkinsonian", "dystonic"]}