High-speed manipulation of information representations. II. Markush (fragment) searches

High-Speed Management of the National Compound Registry

“…The problem of internal rings will be discussed in part III of the series "High-Speed Manipulation of Information Representations". 34 For illustrative purposes suppose that a TQL Item is not partitioned -that is m (in M) ) 1 and r m (in J) ) the rank of the TQL Item. This means that the new chain tracing algorithm will be invoked only once.…”

“…However, the description of the complex algorithm that is used is deferred to a future paper. 34 r-Naphthol (C 10 H 7 OH):…”

“…They can be used to represent static or dynamic threedimensional objects and graphs, like chemical formulas. [31][32][33] The IR form of TQL Item should not be confused with the many different kinds of linear notations, [3][4][5][6][7][8][9] atom connectivity matrix, [10][11][12][13][14][15] graphical, [16][17][18][19] and topological representations [20][21][22][23][24][25][26][27] that have been developed for entering retrieval systems or executing searches with formula or fragments of chemical compoundssTQL differs from all other kinds of representations because it alone has operations that are not found in matrix algebra. For example, the Dugundji-Ugi topological model for Organic Chemistry uses matrix algebra to describe molecules.…”