(1,4-Bis(tert-butoxycarbonyl)-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-7-yl)boronic acid 1g

(1,4-Bis(tert-butoxycarbonyl)-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-7-yl)boronic acid 1g