Complex sentence: Dydrogesterone (INN, USAN, BAN), is also chemically known as 9β,10α-pregna-4,6-diene-3,20-dione, is a steroidal progestin first introduced to the market in 1961.
Split into simpler sentences: Dydrogesterone (INN, USAN, BAN), is also chemically known as 9β,10α-pregna-4,6-diene-3,20-dione. It is a steroidal progestin first introduced to the market in 1961.