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: ["Chemical"].

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

Beyond H(2)S and NO Interplay: Hydrogen Sulfide and Nitroprusside React Directly to Give Nitroxyl (HNO). A New Pharmacological Source of HNO. Hydrogen sulfide (H(2)S) has been increasingly recognized as an important signaling molecule that regulates both blood pressure and neuronal activity. Attention has been drawn to its interactions with another gasotransmitter, nitric oxide (NO). Here, we provide evidence that the physiological effects observed upon the application of sodium nitroprusside (SNP) and H(2)S can be ascribed to the generation of nitroxyl (HNO), which is a direct product of the reaction between SNP and H(2)S, not a consequence of released NO subsequently reacting with H(2)S. Intracellular HNO formation has been confirmed, and the subsequent release of calcitonin gene-related peptide from a mouse heart has been demonstrated. Unlike with other thiols, SNP reacts with H(2)S in the same way as rhodanese, i.e., the cyanide transforms into a thiocyanate. These findings shed new light on how H(2)S is understood to interact with nitroprusside. Additionally, they offer a new and convenient pharmacological source of HNO for therapeutic purposes.
{"Chemical": ["nitroxyl", "Nitroxyl", "H(2)S", "Hydrogen sulfide", "cyanide", "nitroprusside", "sodium nitroprusside", "SNP", "thiocyanate", "HNO", "nitric oxide", "thiols", "Nitroprusside", "Hydrogen Sulfide", "NO"]}