name ='r-uracil_3ter'
symbol ='RU3'

phosphate = Group('na_phosphate')
sugar = Group('ribose_3ter')
base = Group('uracil')

bonds = [Bond(sugar.O_5, phosphate.P), Bond(base.N_1, sugar.C_1), ]

chain_links = [phosphate.P, None]

amber_charge = {phosphate.P:          1.1662,
                phosphate.O_1:       -0.7760,
                phosphate.O_2:       -0.7760,
                sugar.O_5:           -0.4989,
                sugar.C_5:            0.0558,
                sugar.H_51:           0.0679,
                sugar.H_52:           0.0679,
                sugar.C_4:            0.1065,
                sugar.H_4:            0.1174,
                sugar.O_4:           -0.3548,
                sugar.C_1:            0.0674,
                sugar.H_1:            0.1824,
                base.N_1:             0.0418,
                base.C_6:            -0.1126,
                base.H_6:             0.2188,
                base.C_5:            -0.3635,
                base.H_5:             0.1811,
                base.C_4:             0.5952,
                base.O_4:            -0.5761,
                base.N_3:            -0.3549,
                base.H_3:             0.3154,
                base.C_2:             0.4687,
                base.O_2:            -0.5477,
                sugar.C_3:            0.2022,
                sugar.H_3:            0.0615,
                sugar.C_2:            0.0670,
                sugar.H_21:           0.0972,
                sugar.O_2:           -0.6139,
                sugar.H_O2:           0.4186,
                sugar.O_3:           -0.6541,
                sugar.H_3_terminal:   0.4376,
                }
