6 methoxy 2 nitrotoluene 4837 88 1 2 methyl 3 nitrobenzoic acid ( cas no. 1975 50 4) 2 bromomethyl 3 nitrobenzoic acid methyl ester (cas no. 98475 07 1 3 aminopiperidine 2,6 dione hydrochloride (cas no.24666 56 6 2 methyl 6 nitrobenzoic acid (cas no. 13506 76 8) 3 bromo 1 propanol ( cas no. 627 18 9) ttbb (2 n triphenylmethyl tetrazoly 4 bromomethyl biphenyl) (cas no. 133051 86 4).