MolProp TK 2.4.7

Minor bug fixes

• The pains_pre_aminal1 rule has been removed from the PAINS filter. The SMARTS for the rule was incorrectly defined and was overly general. The rules pains_basic_amine1, pains_basic_amine2, and pains_basic_amine3 cover the same general structural classes in a more precise manner. A SMARTS issue with the pains_basic_amine3, uncovered after removing the pains_pre_aminal1 rule, has also been corrected.