coumarins , furocoumarins and pyranocoumarins ( 29 compounds ) were investigated in silanized silica ( hptlc rp-2 and rp-18 and hplc rp-18 ) -water organic modifier ( methanol , acetonitrile , dioxane , tetrahydrofuran and methanol containing acetic acid ) systems .
C0010207
coumarins
C1136319
pyranocoumarins