2,4-Dihydroxybenzaldehyde
2-hydroxy-4-[(tetrahydro-2H-pyran-2-yl)oxy]benzaldehyde
4-(tetrahydro-pyran-2-yloxy)-2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzaldehyde
trifluoro-methanesulfonic acid 2-formyl-5-(tetrahydro-pyran-2-yloxy)-phenyl ester
(1,6-dihydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-3-yl)-acetic acid ethyl ester