If the molecular formula
you are searching |
Then your action is to |
Represents a multi-component
substance |
Search the dot-disconnected formula in the /MF
index. Arrange the components as follows:
- All components contain carbon -
Arrange by descending carbon count
- No carbon-containing components -
Arrange alphabetically by first
element in each component
- Both carbon and non-carbon
components-
Carbon components come first
|
| Represents the salt of an acid |
Search the dot-disconnected formula
in the /MF index
Replace the metal with hydrogen in the acid
formula and
dot-disconnect the metal |
| Represents the salt of an amine |
Search the dot-disconnected formula
in the /MF index
Remove one hydrogen from amine
formula and add it to the anion.
Dot-disconnect the resulting formula |
| Retrieves too many hits |
Refine the answer set by:
- Requiring that rings be present
(AND RSD/FA)
- Eliminating ring-containing
substances (NOT RSD/FA)
- Adding chemical name segments
|
Reproduced with the permission of CAS, a Division of the
American Chemical Society, from "Tips for Searching the CAplus & REGISTRY Files."
(CAS9613-0298)
