This Server uses the Chemscape Server software to allow users to search via structure or compound identifier on the SIS ChemIDplus database of over 350,000 chemicals,  and the NCI-3D Database. To do this you will need: 

• A version of Netscape Navigator or Microsoft IE which provides the capabilities needed to accept a structure query into a Netscape plug-in. Currently, this prototype works with Navigator 4.75 or higher, or IE 5.5 or higher. Netscape 6.x is not recommended.
• Chime Version 2.6sp1 is the latest version available from MDL for Win-95/NT, or Mac (Power PC) using Netscape 4.75 or higher, and IE Explorer 5.5 or higher (except Macs). 
• Chime Version 1.02 is also available for users with Windows 3.1, Win-95/NT, Mac (68K or Power PC) or IRIX, who use older browsers such as Netscape 2 or 3.01. 

Types of Structure Queries

• Substructure Search: The structure in the Chime Box will be used to search for all compounds having that "substructure" and other atoms. 
• Similarity Search: The structure in the Chime Box will be used to search for all compounds that contain structural features that are "similar" based on an algorithm in Chemscape. The user chooses the percent similarity at a prompt. The output is in order by simlarity score.
• Exact Structure: The structure in the box will be used to find an exact match in the database. 

• Name/Synonym: Any chemical name of interest.  
• Registry Number : The CAS Registry Number with or without leading zeros. 
• REGNO: A sequential accesion number assigned by the system. 
• Formula: The Molecular Formula in hyphenated format.
• Classification Code: The general category assigned to a chemical based on toxicity, use, pharmacology, or status in certain chemical lists.
• Locator Code: The name of an NLM database or a major resource which has information about a chemical compound. 

 Numeric: 

• The numeric operators such as equals, less than, greater than 
• Exists: There is a value in this field for a record. 

• The logical operators such as Equals 
• Starts With: Field begins with input text. 
• Contains: Field contains the input text 

A user may choose a structure from the results structure box with two options:

• Use Structure for Query, which pastes the retrieved structure back to the Chime Query box. 
• Use Structure for Similarity, which starts an immmediate search for similar structures. 

To paste a structure query from ISIS/Draw into the query page: 

• If you are using ISIS/Draw 2.3 or higher, you can "hot-link" to ISIS/Draw via the Chime menu item "Edit" "Transfer to ISIS/Draw". Right Click on the Chime box to see the menu. Once you have drawn your query in ISIS/Draw, click on the small transfer icon in the upper left corner of the drawing area to bring it in to the Chemscape query page. For the latest versions of Chime and ISIS/Draw, you should be able to double click on the Chime box to invoke ISIS/Draw 
• For all other versions of ISIS/Draw or other drawing packages, first draw it using ISIS/Draw or a compatible chemical drawing package, copy the query to the clipboard, and then paste it into the Chime plug-in located on the query page by selecting the Chime menu item "Edit" then "Paste". (To get to the Chime menu, position the cursor over the Chime plug-in and click on the right mouse button under Windows or click and hold down the mouse button on the Macintosh.)