Crystallographic Nexus, Virtual Internet on CD-ROM Talk: ECM-18, August 1998, Prague, Czech Republic, l.cranswick@dl.ac.uk, http://www.ccp14.ac.uk/, http://www.unige.ch/crystal/stxnews/nexus/index.htm
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Example of Soft (but highly useful) Information Available on the Internet.

Refer: Structure Determination by Powder Diffractometry Round Robin [http://fluo.univ-lemans.fr:8001/SDPDRR/]

Searching on the molecular formula for sample 2. using "Inference find" (http://www.inference.com/infind/ - C22H24N2O8 - and C22H24N2O8.HCL) reveals not only the name and connectivity in pages such as TR-344 Toxicology and Carcinogenesis Studies of Tetracycline Hydrochloride (CAS No. 64-75-5) in F344/N Rats and B6C3F1 Mice (Feed Studies) (http://ntp-server.niehs.nih.gov/htdocs/LT-studies/tr344.html) but also a starting molecule in MDL Mol File format (http://ntp-server.niehs.nih.gov/htdocs/structures/3d/TR344.mol) | [local].

- - - - Gif from Webpage - - - - - Chemdraw derived MDL Mol file Directly in Rasmol

Tetracycline model off the internet in chemdraw mode Tetracycline molecule off the internet displayed in stick mode

Compared to Connectivity Derived from Expensive Commercial Database

Tetracycline molecule With Incorrect Connectivity off the internet displayed in stick mode Tetracycline molecule off the internet displayed in space fill mode
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