Table 2.

Percentage of acid and base containing compounds in the Williams³³ and WDI datasets²⁸.

List	1 acid	1 base	2 acids	2 bases	1 acid + 1 base	Others
Entire dataset	24.4	45.4	3.8	10.5	11.2	4.8
CNS subset	15.5	62.1	1.1	13.2	7.5	0.6
Non-CNS subset	28.2	38.2	4.9	9.3	12.7	6.6
WDI*	11.6	42.9	3.0	24.6	7.5	10.4

^*Data taken from Comer and Tam²⁹,³⁰