NO WARRANTY DISCLAIMER
Contributed by John Bradshaw (Glaxo-Wellcome)
SIGMA database. As a tenth anniversary present, this is the substituent constant data, π, that came from Pomona College on microfiche. Various data have been added such as STERIMOL parameters and we have access to the H-bonding data of Abrahams.
The trees here are formally rooted in SMILES albeit, partial structures. Subject to Biobyte's agreement this database can be distributed or put on the http server list. The Abrahams' data are not in the MUG version of the database.