Table 4 Return numbers based on small structural patterns ^a

Aii doesn't have a double bond

Bond types are 5 and 6

A1 has more than 1 bonds

A3 has more than 1 bonds

 $\begin{array}{l}O12=4\\ O23>4\end{array}$

 $\begin{array}{l}O12>4\\ O23=4\end{array}$

A2 has three bonds

 Others