Software Developer's Kit - ChemDraw

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CDBracketUsage Enumeration
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Description

Members

MemberValueDescription
kCDBracketUsageUnspecified0 bracket usage is unspecified.
kCDBracketUsageAnypolymer18 represents any polymer.
kCDBracketUsageComponent13  indicates individual mixture elements. The component order must be a non-negative integer, and is displayed as the letter "c" followed by that integer (or "c" alone if an order of zero is specified).
kCDBracketUsageCopolymer6 represents specific types of copolymers in a source-based representation (their use is discouraged).
kCDBracketUsageCopolymerAlternating7  represents specific types of copolymers in a source-based representation (their use is  discouraged).
kCDBracketUsageCopolymerBlock9 represents specific types of copolymers in a source-based representation (their use is  discouraged).
kCDBracketUsageCopolymerRandom8  represents different specific types of copolymers in a source-based representation (their use is discouraged).
kCDBracketUsageCrosslink10  represents specific types of repeating units in a structure-based representation (their use is discouraged).
kCDBracketUsageGeneric17  represents generic brackets.
kCDBracketUsageGraft11  represents specific types of repeating units in a structure-based representation (their use is discouraged).
kCDBracketUsageMer5 represents components of a copolymer where the individual components are known not to repeat themselves or alternate with other components.
kCDBracketUsageMixtureOrdered15 primarily used to describe manufacturing processes, where the ordering of components is a critical part of the process (and where a different ordering might produce a different final product). Individual elements of an ordered mixture should be surrounded by brackets with a bracket usage of "Component (c)". Components of Ordered Mixtures must represent their ordering. You can do this by editing the "c" label with the text tool to include a number ("c1", "c2", ...).
kCDBracketUsageMixtureUnordered14  represents a collection of substances that may all be present, but not necessarily in known amounts
kCDBracketUsageModification12 represents specific types of repeating units in a structure-based representation, but they are rarely encountered and using them is discouraged.
kCDBracketUsageMonomer4 represents a source-based representation
kCDBracketUsageMultipleGroup16 the (#) indicates that the enclosed items are repeated a specific known number of times. Multiple Group brackets may enclose entire structures, or may enclose a portion of the structures only. The repeat count must be a positive integer. Because Multiple Group brackets represent a specific repeat count (unlike the unknown repeat count of the other bracket types), it is possible to calculate accurate molecular weights (and related data). 
kCDBracketUsageSRU3 indicates SRU (structural repeating unit) of a structure-based polymer representation. The subscript "n" is recommended by IUPAC to notate structure-based representations of unknown size, but you can edit the text using the text tool.
kCDBracketUsageUnused11 
kCDBracketUsageUnused22 

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