FYI: Structure check filter

[sishida21]

rd_filters could be used for structure validation.

This script provides a simple means of applying the functional group filters from the ChEMBL database, as well as a number of property filters from the RDKit, to a set of compounds. As of ChEMBL 23, the database table structural_alerts contains 8 sets of alerts. ChEMBL doesn't apper to have much in the way of documentation on the different alert sets.

Rule Set	Number of Alerts
BMS	180
Dundee	105
Glaxo	55
Inpharmatica	91
LINT	57
MLSMR	116
PAINS	479
SureChEMBL	166