Text this: 1,3,2,5-Diazadiborinine featuring nucleophilic and electrophilic boron centres

 _    _      ___                 ___      _____   
| || | ||   / _ \\      ___     / _ \\   /  ___|| 
| || | ||  | / \ ||    /   ||  | / \ || | // __   
| \\_/ ||  | \_/ ||   | [] ||  | \_/ || | \\_\ || 
 \____//    \___//     \__ ||   \___//   \____//  
  `---`     `---`       -|_||   `---`     `---`   
                         `-`