Pyrrolidinyl Diaminopyrimidine oxide is a new compound very similar to Minoxidil that is used to treat hair loss in men and women, as well as for the growth of beards, eyebrows, eyelashes, etc. What is Pyrrolidinyl Diaminopyrimidine? Pyrrolidinyl Diaminopyrimidine’s full name is Pyrrolidinyl Diaminopyrimidine oxide, abbreviated to PDO or PDPO, also known as kopyrrol. There are other hair growth products …