Sorry to disrupt The one above is not its full name (I have some knowledge about organic chemistry) due to the fact that it ended in phenyl, which is only part of a prefix of a compound. This means that the name is somehow longer than this. From what I researched, the short name is enaptin, and the long name is around 64,060 letters.
I didn't believe it was a word at first but it is! Other wise known as titin, that word (I'm not going to type it) is the protein responsible for muscle elasticity.