IUPAC nomenclature

Plant nomenclature means :-

Name the following compounds according to IUPAC system of nomenclature (CH_(3))_(3)"CC"H_(2)COOH

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

Name the following compounds according to IUPAC system of nomenclature CH_(3)CH=CHCHO

Name the following compounds according to IUPAC system of nomenclature CH_(3)COCH_(2)COCH_(3)