Plot: We get it, learning so many different organic reactions is probably giving you a headache, but hopefully this episode can help! We’re getting even deeper into carboxylic acid derivatives, some of which are used in common headache relieving painkillers. In this episode of Crash Course Organic Chemistry, we’ll learn how to convert more reactive carboxylic acid derivatives into less reactive ones, turn carboxylic acids into acid chlorides, reduce carboxylic acid derivatives using metal hydrides, and more! Plus, we’ll get to add the first stage of synthesizing Penicillin V to our Mold Medicine Map!