What you're looking at is the chemical name for titin, the largest known protein in the human body. At 189,819 letters, it's so long that grad students who try to pronounce it typically finish their PhDs before reaching the end. The protein itself helps muscles contract, but its name could probably cause muscle strain just by trying to read it. Scientists clearly had too much free time when naming this one—or maybe they just wanted to ensure job security by creating words only they could pronounce.