Is 220,220 really the result of 220 experiments?
Yes, in fact, there are many such examples in the history of drug development. They named drugs after the success of XX experiment or the best effect of the samples prepared in XX experiment, such as mercuric chloride (containing 2% mercuric chloride), the first anti-syphilis drug arsenic vanadate, also known as 606, which is the No.606 among all samples prepared in ehrlich.