# Unnatural RNA

**URL:** <https://gromacs.bioexcel.eu/t/unnatural-rna/10760>\
**Category:** User discussions\
**Created:** [December 9, 2024, 2:41pm UTC](https://gromacs.bioexcel.eu/t/unnatural-rna/10760 "2024-12-09T14:41:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fanta](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@fanta](https://gromacs.bioexcel.eu/u/fanta)\
**Post date:** [December 9, 2024, 2:41pm UTC](https://gromacs.bioexcel.eu/t/unnatural-rna/10760/1 "2024-12-09T14:41:07Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question  
Hi  
I am new to Gromacs and MD.  
I have an unnatural RNA base that I want to run MD on  
Where and how can I update the forcefield to recognize it and find parameters?