Bis(thiazoline) and bis(oxazoline) possess the same fragmentation mechanism under EI conditions.An unusual fragmentation pathway has been found in the compounds studied.

• 在EI条件下，双恶唑啉系列和双噻唑啉系列具有基本相同的碎裂机理，在所研究的化合物中发现了一个不常见的碎裂途径。