2-(Hydroxymethyl)-5-nitrobenzeneboronic acid dehydrate1-Hydroxy-6-nitro-2,1-benzoxaborolane2-Hydroxymethyl-5-nitrobenzeneboronic acid cyclic monoester2-羟基甲基-5-硝基苯硼酸半酯2-Hydroxymethyl-5-nitrobenzeneboronic acid hemiester6-Nitrobenzo[c][1,2]oxaborol-1(3H)-ol