FIELD D 

 Columns 12, 13, 14, 



15, 16, and 17 



SECONDARY COMPOUND 



Organization 



In this field, six IBM punched card columns are provided for entering the Serial Number of a 

 chemical compound. The basic CBCC Chemical Serial Number consists of six units (six letters or 

 numbers); however, there is in addition a 2- unit system for designation of salts and radioactivity. 

 Since there is not sufficient space in this 6-column secondary compound field for entering the two final 

 units indicating a salt or specific radioactivity, the latter information, when known, must be included 

 in the written abstract portion of the field. In the following descriptions, "coding" a secondary 

 compound in Field D refers to the use of the compound's Serial Number as a code symbol, not to the 

 structural coding which is found only in the Chemistry Files. 



General Use 



Field D is used for coding a compound other than the test compound (i. e. , it is for coding a 

 "secondary" compound). 



Coding a compound in Field D is restricted to instances when any of certain specific relation- 

 ships exist between the action of a test compound and another (a "secondary") compound. These 

 circumstances under which Field D is coded are indicated in the definitions of the code symbols of 

 other fields; therefore, Field D is never coded unless there are specific directions, with the code 

 symbol of some other field , to code a compound in Field D. The four general uses of Field D are 

 listed at the end of this section. 



In a case when it is appropriate to use Field D, the name of the compound and the structural 

 formula are written on the Code Sheet, in the written abstract portion of the field. It is essential to 

 indicate all double bonds, group positions, etc. , in full. Do not use abbreviations, such as PABA 

 for para-aminobenzoic acid, if the full name is given in the paper. 



The coding of the compound requires that the coder have access to the CBCC Chemistry Index 

 Card File arranged alphabetically by name; on each card of this file is the basic six-unit CBCC Serial 

 Number assigned to the compound represented on the card. If this file is not available to the coder, 

 Field D must be left uncoded and the code boxes left open for filling in by someone who does have 

 access to the Chemistry Index Card File. In this case, however, the coder must always have completed 

 the written abstract for the field as well as any of the three special code designations in Column 16 or 

 17, when the latter are appropriate. (See Divisions 3, 4, 5, 10A, and 10B, in the following section, 

 Specific Directions and Explanations, relative to these special symbols. ) 



Field D is used to express: 



1. A compound whose action is synergized or potentiated (Field T-l, 8); 

 antagonized, neutralized, or antidoted (Field T- 1, 9); simulated or 

 replaced (Field T-l, A) by the test compound; or additive with the test 

 compound (Field T- 1, C). 



2. A compound, naturally occurring or administered, whose uptake (Field T-2, 

 F6--), synthesis (Field T-2, F8--), distribution (Field T-2, F9--), storage 

 or concentration (Field T-2, FA--), absorption (Field T-2, FB--), excretion 

 (Field T-2, FC--), ability to permeate (Field T-2, FG--), incorporation 

 (Field T-2, FH--), withdrawal (Field T-2, FI--), alteration (Field T-2, 

 FE--), or elimination (Field T-2, FF--) is affected by the test compound. 



3. A compound which serves as a standard for comparison with the test compound 

 (Field X, Criterion 03 or 04). (This use of the field is distinguished by coding 

 an asterisk in Column 17. ) 



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