1.1有机化学及其发展历史和趋势 aIn 1828. Fridrich Wohler convert the inorganic?' salt ammonium cyanate into the“ organIc” substance urea Heat NH4 OCN NH NH 21.1 有机化学及其发展历史和趋势 ◼ In 1828, Fridrich Wohler convert the “inorganic” salt ammonium cyanate into the “organic” substance urea NH4 + - OCN NH2 O NH2 Heat