“…Nitrogen and sulfur mustards (Figure 1; 1 – 4 ), also called yperites, occupy a peculiar place in chemistry history; from battlefields to the first cancer treatment, their story covers almost 200 years. Bis(2‐chloroethyl)sulfide 1 , discovered in 1822, [1] was described as a malodorous, high boiling compound able to aggressively attack the hydrated parts of the body, like eyes and lungs, leading, in case of prolonged exposure, to death [2–3] …”