source leaprc.gaff
loadamberprep pet.prepi
loadamberprep hpt.prepi
loadamberprep tpt.prepi
mol = sequence {HPT PET PET PET PET PET PET PET PET PET PET PET PET PET PET PET PET PET PET TPT}
savepdb mol pet20.pdb
saveamberparm mol pet20.prmtop pet20.inpcrd
quit
