YELLAPRAGADA SUBBAROW, EMINENT SCIENTIST AND PHYSICIAN SURGEON. And biochemist..who remained unsung Inspite of his many achievements.He discovered adenosine triphosphate as an energy source in the cell. he discovered methotrexate as tge drug for treating cancer and is being used even today.He also found diethyl carbamazine as t.ge only drug to treat filariasis.He us tge first synthesiser of chem compound Such as frolic acid and methotrexate. he led many research teams with success. However , he did not get chance to work at Harvard. he passed away suddenly in America at younger age of 55 years.