2-Carboxynaphthalene 2-Maythic acid 2-Naphthalenecarboxylic acid 2-Naphthoic acid 4-09-00-02414 (Beilstein Handbook Reference) 93-09-4 AI3-16903 BRN 0972039 EINECS 202-217-8 Isonaphthoic acid NAPHTHALENE-2-CARBOXYLIC ACID NSC 59901 Naphthalene-beta-carboxylic acid beta-Naphthoic acid ne-2-carboxylic acid