---
search:
boost: 5.0
---
# Slot: molecular_formula
_The molecular formula of a molecule\_
URI: [https://CCPBioSim.ac.uk/biosim-schema/molecular_formula](https://CCPBioSim.ac.uk/biosim-schema/molecular_formula)
## Applicable Classes
| Name | Description | Modifies Slot |
| --- | --- | --- |
| [MoleculeID](../classes/MoleculeID.md) | Identifiers of a molecule type in the simulated system | no |
## Properties
### Type and Range
| Property | Value |
| --- | --- |
| Range | [string](../types/string.md) |
| Domain Of | [MoleculeID](../classes/MoleculeID.md) |
### Cardinality and Requirements
| Property | Value |
| --- | --- |
### Value Constraints
| Property | Value |
| --- | --- |
| Regex Pattern | `^([A-Z][a-z]?\d*)+$` |
## Examples
| Value |
| --- |
| C8H10N4O2 |
## Identifier and Mapping Information
### Annotations
| property | value |
| --- | --- |
| engine_mapping | [{'engine': 'toptrajparser', 'key': 'molecular_formula'}] |
### Schema Source
* from schema: https://CCPBioSim.ac.uk/biosim-schema/
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | https://CCPBioSim.ac.uk/biosim-schema/molecular_formula |
| native | https://CCPBioSim.ac.uk/biosim-schema/molecular_formula |
## LinkML Source
```yaml
name: molecular_formula
annotations:
engine_mapping:
tag: engine_mapping
value:
- engine: toptrajparser
key: molecular_formula
description: The molecular formula of a molecule\
examples:
- value: C8H10N4O2
from_schema: https://CCPBioSim.ac.uk/biosim-schema/
rank: 1000
domain_of:
- MoleculeID
range: string
pattern: ^([A-Z][a-z]?\d*)+$
```