2-***甲醛；1121-60-4；2-Pyridinemethanol2-pyridinecarboxaldehyde；黄棕色液体≥983-***甲醛；500-22-1；3-Pyridinemethanol3-甲酰基***nicotinaldehyde；黄棕色液体≥984-***甲醛；872-85-5；4-Pyridinemethanolisonicotinaldehyde；浅***液体≥98)