NCBI/PubChem | NCI/CIR
--- | ---

test http sync (failing in FF) test https sync (works)
test http async (failing in FF) test https async (works)
My observations are that PubChem access is now
(as of 3/7/2014) by https only. This is a problem.

test http sync (works) test https sync (will time out)
test http async (works) test https async (will time out)
NCI's Chemical Identifier Resolver does not provide https service.
This is a different problem.