Rapid Structure Searches via Permuted Chemical Line-Notations.

On-Line Substructure Searching Utilizing Wiswesser Line Notations

“…Smith et al 2 and Ashmole et al 3 have reported comparative studies on the retrieval ratio and cost effectiveness of Excerpta Medica, Ringdoc, and other systems. The Drugdoc Study Committee4 also reported a comparative study of Drugdoc and Ringdoc from the coverage of both systems in 14 drug-related biomedical journals and on the output and distribution of subject areas according to importance to the drug propranolol.…”

Multi-Level Retrieval Systems. III. A Generic Chemical Search System Using Optical Coincidence Cards

“…These cards show the following layouts: cc [1][2][3][4][5][6][7][8][9][10][11][12] Fragment Codes (Card 2). Fragment codes relating to the functional groups that are generally found in the Warner-Lambert compound collection are entered, one code per card, in cc 16-21 of Card 2 and are designed to offer increasing levels of either genericity or specificity, as may be desired in a given search.…”

Retrieval of Organic Structures from Small-to-Medium Sized Collections.

“…For example, where the collection is to be aligned according to the BATCH Number, a preliminary sort on column 51 assures that if two compounds, other than simple position isomers, have the same BATCH Number, the more complex one will follow the simpler one. This notation size also can serve as an effective computer control where permutation of the notation and listing would be undertaken following the proposals of Sorter and co-workers (11). In some applications, it may be appropriate to allow the notation size to print.…”