# CHARMM parameter files for NBD (nitrobenzoxadiazole)

I have been looking all over the internet for forcefield parameters for a fluorescent probe called NBD (nitrobenzoxadiazole). Here is an example of an NBD labeled fatty.

I have so far only found parameters for AMBER or GROMACS. Also when following the articles from these two reviews, there seem to be no CHARMM parameters anywhere.

My questions are:

• What CHARMM forcefield parameters would you use for NBD?
• How could I transfer the AMBER or GROMACS parameters for use in CHARMM?
• The links to products.invitrogen.com and springerlink.com are both broken. Perhaps you could take a look, whenever possible... Jun 3 at 12:32