Sodium Hydrogen Sulfide (hydrate) is, like nitric oxide, an important gaseous mediator that has significant effects on the immunological, neurological, cardiovascular and pulmonary systems of mammals. Sodium Hydrogen Sulfide (hydrate) is an H2S donor commonly used in cellular and whole animal experimental systems. For example, it has been used to suggest that H2S promotes neutrophil migration, reduces airway inflammation, and protects neurites, heart, and intestine from chemical or ischemic-reperfusion damage.

辛酸天然存在于椰子和母乳中。它是一种油状液体，具有轻微令人不快的酸败味，微溶于水。辛酸在商业上用于生产香料中使用的酯，也用于制造染料。

(D-Ala4)-Substance P (4-11)