< 110 > Anygen Co . , Ltd . < 120 > Spinorphin derivatives as potent and selective human P 2 X 3 receptor antagonist < 160 > 5 < 170 > KopatentIn 1 . 71 < 210 > 1 < 211 > 7 < 212 > PRT < 213 > Artificial Sequence < 220 > < 223 > Peptide 6 < 400 > 1 Ala Val Val Tyr Pro Trp Thr 1 5 < 210 > 2 < 211 > 7 < 212 > PRT < 213 > Artificial Sequence < 220 > < 223 > Peptide 7 < 400 > 2 Leu Ala Val Tyr Pro Trp Thr 1 5 < 210 > 3 < 211 > 7 < 212 > PRT < 213 > Artificial Sequence < 220 > < 223 > Peptide 8 < 400 > 3 Leu Val Ala Tyr Pro Trp Thr 1 5 < 210 > 4 < 211 > 7 < 212 > PRT < 213 > Artificial Sequence < 220 > < 223 > Peptide 9 < 400 > 4 Leu Val Val Ala Pro Trp Thr 1 5 < 210 > 5 < 211 > 7 < 212 > PRT < 213 > Artificial Sequence < 220 > < 223 > Peptide 13 < 400 > 5 Leu Val Val Tyr Pro Trp Tyr 1 5