The longest chemical compound name is often considered to be the systematic name for a protein called "Titin." Titin is a large protein found in muscle tissues and is involved in muscle contraction.
The systematic name for Titin is based on its amino acid sequence, which consists of over 189,000 letters. The full systematic name of Titin is extremely lengthy and includes the names of all the amino acids in the protein, along with additional information about its structure and function.
Due to its impractical length, the systematic name for Titin is not commonly used in scientific literature or discussions. Instead, the protein is typically referred to as "Titin" or "connectin," which are much shorter and more manageable.
It's worth noting that there may be other chemical compounds or complex molecules with extremely long systematic names, but the name of Titin is often cited as one of the longest known.