InChI=1S/C23H27BN4O4/c25-15-18-9-4-8-17(12-18)14-21(24(31)32)27-22(29)20-10-5-11-28(20)23(30)19(26)13-16-6-2-1-3-7-16/h1-4,6-9,12,19-21,31-32H,5,10-11,13-14,26H2,(H,27,29)/t19-,20+,21+/m1/s1