At first they used a different chemical called amyl nitrite, a compound that we now know has a nitrite group that dilates blood vessels and lowers blood pressure.

起初，他们使用了一种不同的化学物质，称为亚硝酸戊酯，我们现在知道这种化合物有一个亚硝酸盐基团，可以扩张血管并降低血压。