1-(Diethoxymethyl)-4-methoxybenzene 2403-58-9 28135-52-6 AI3-06443 Anisaldenyde diethyl acetal Benzene, 1-(diethoxymethyl)-4-methoxy- EINECS 219-288-6 NSC 20033 p-(Diethoxymethyl)anisole para-Methoxybenzaldehyde diethyl acetal