|CDX Constant Name:||kCDXProp_Atom_Formula|
|CDX Constant Value:||0x0404|
|Property of objects:||kCDXObj_Node|
|First written/read in:||(not written/read)|
The composition of a node representing a fragment whose composition is known, but whose connectivity is not. For example, C4H9 represents a mixture of the 4 butyl isomers.
It consists of a series of pairs of UINT16s. Each pair represents an element and a count, for example, 6, 4, 1, 9 for C4H9.
If this property is absent:
This property is not read (or written) by ChemDraw, but is defined for future compatibility. There is no consequence to omitting it.