Four famous Filipino chemists are Julian Banzon, Ramon Barba, Rolando De La Cruz, and Eduardo San Juan. During the 1930's and 40's, Julian Banzon worked with alternative fuel sources and found a means of chemically extracting coconut oil from the coconut. Ramon Barba discovered ways to use potassium nitrate to improve agricultural results. Rolando De La Cruz invented a skin cream that has anti-cancer properties. And Edwardo San Juan partnered with a group to invent and launch the "Moon Bugg".