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b-Brazan. BETA-BRAZANE Benzonaphthofuran naphtho[2,3-b]benzofuran BENZO[b]NAPHTHO[2,3-d]FURA 2,3-BENZODIPHENYLENE OXIDE BENZO[B]NAPHTHO[2,3-D]FURAN Naphtho[2,3-b][1]benzofuran Benzo[b]naphtho[2,3-d]furan,90%,tech. Benzo[b]naphtho[2,3-d]furanbeta-Brazane BENZO[B]NAPHTHO[2,3-D]FURAN, TECH., 90%