B 2700 (OTTO) 5-Bromovaleric acid, 98% Cas 2067-33-6 - used in the synthesis of inhibitors for aminoglycoside resistant bacteria. B 2700 (OTTO) 5-Bromovaleric acid, 98% Cas 2067-33-6 - used in the preparation of sequence specific base pair mimics as topoisomerase IB inhibitors.