pentamethide

例句：

1. 1. The pentamethide is a complex organic compound with five valence electrons.
   这种五价化合物是一种复杂的有机化合物，具有五个价电子。
2. 2.The pentamethide was found to have unusual properties that make it useful in certain applications.
   这种五价化合物被发现具有异常性质，使其在某些应用中非常有用。
3. 3. The pentamethide was used as a catalyst in the synthesis of organic compounds.
   这种五价化合物被用作有机化合物合成的催化剂。