2-hydroxy-4-piperidin-1-ylbenzaldehyde InChI=1/C12H15NO2/c14-9-10-4-5-11(8-12(10)15)13-6-2-1-3-7-13/h4-5,8-9,15H,1-3,6-7H benzaldehyde, 2-hydroxy-4-(1-piperidinyl)-