STRUCTURE ELUCIDATION OF FLAVONOID COMPOUND FROM THE LEAVES OF COLEUS ATROPURPUREUS BENTH USING 1D- AND 2D-NMR TECHNIQUES (Elusidasi Struktur Sebatian Flavonoid Dari Daun Coleus Atropurpureus Benth Menggunakan Teknik 1D- Dan 2D-NMR)