Overprotective Memes

The chemical compound shown is 9-fluorenylmethoxycarbonyl chloride (Fmoc-Cl), which is commonly used as a protective group in organic synthesis! The joke is that the chemist is ready to "protect" his sister from her new boyfriend - just like how Fmoc-Cl protects reactive amino groups during peptide synthesis! Chemists really do have a solution for everything... even overprotective brother syndrome! 😂 Next-level chemistry pun that perfectly combines family dynamics with organic chemistry knowledge!