(4-Methoxyphenyl)arsonic acid (p-Methoxyphenyl)arsonic acid 3-16-00-01070 (Beilstein Handbook Reference) 4-Methoxybenzenearsonic acid 6307-51-3 Arsonic acid, (4-methoxyphenyl)- (9CI) BRN 2937082 Benzenearsonic acid, p-methoxy- NSC 41366 p-Methoxybenzenearsonic acid