0  B6R0.5  C[N+](C)(C)CCO gut39 [1,0,0,0,0,0|3,0,0]=4
1  B7R0.9  CC(C)(CC(=O)[O-])O 3-Hydroxy-3-methylbutanate [1,1,0,0,0,0|2,0,0]=4