Nalorphine dinicotinate Naloxazone Naloxegol Naloxol Naloxonazine Naloxone Naltrexazone Naltrexonazine Naltrexone Naltrindole Naringenin Noribogaine Oxilorphan Pawhuskin A PF-4455242 RB-64 Quadazocine Taxifolin UPHIT Zyklophin Unknown/unsorted: Akuammicine Akuammine Coronaridine Cyproterone acetate Tabernanthine Tetrahydrocannabinol Agonists: 3CS-nalmefene 6'-GNTI 8-CAC 18-MC 14-Methoxymetopon β-Chlornaltrexamine β-Funaltrexamine Adrenorphin (metorphamide) AH-7921 Akuammicine Akuammidine Alfentanil Anileridine Apparicine β-Endorphin BAM-12P BAM-18P BAM-22P Big dynorphin Bremazocine BRL-52537 Butorphan Butorphanol BW373U86 Casokefamide Cebranopadol Codeine Cyclazocine DADLE Deltorphin A Deltorphin I Deltorphin II Desmethylclozapine Desmetramadol (desmethyltramadol) Desomorphine Dextromoramide Dextropropoxyphene (propoxyphene) Dezocine Dimenoxadol Dimethylaminopivalophenone Eluxadoline Diamorphine (heroin) Dihydrocodeine Dihydroetorphine Dihydromorphine DPDPE DPI-221 DPI-3290 DSLET Ethylketazocine Etorphine Fentanyl Fluorophen Frakefamide Furanylfentanyl Hemorphin-4 Herkinorin HS665 Hydromorphone HZ-2 Ibogaine ICI-199,441 ICI-204,448 Ketamine Ketazocine Laudanosine Leumorphin (dynorphin B-29) Levallorphan Levomethorphan Levorphanol Lexanopadol Lofentanil LPK-26 Lufuradom Matrine MB-1C-OH Menthol Metazocine Metkefamide Mitragynine Mitragynine pseudoindoxyl Morphiceptin Morphine Nalbuphine NalBzOH Nalmexone Naltalimide Neopine NFEPP Nicocodeine Nicodicodine Nicomorphine Norketamine Nufenoxole Octreotide Oliceridine Oxycodegol OM-3-MNZ Oripavine Oxycodone Oxymorphazone Oxymorphonazine Oxymorphone MOR Oxymorphone phenylhydrazone OxyPNPH Papaver somniferum (opium) Pentazocine Pericine Pethidine (meperidine) Phenazocine Proxorphan Racemethorphan Racemorphan NOP Ro64-6198 Ro65-6570 SCH-221510 SCH-486757 SR-8993 SR-16435 Sunobinop (S-117957) TH-030418 Antagonists: (Nphe^1)Nociceptin(1-13)NH[2] AT-076 BAN-ORL-24 BTRX-246040 (LY-2940094) J-113,397 JTC-801 NalBzOH Nociceptin (1-7) Nocistatin SB-612,111 SR-16430 Thienorphine Trap-101 UFP-101 β-Casomorphins Amidorphin BAM-20P Cytochrophin-4 Deprolorphin Gliadorphin (gluteomorphin) Gluten exorphins Hemorphins Kava constituents MEAGL Unsorted MEAP NEM Neoendorphins Nepetalactone (catnip) Peptide B Peptide E Peptide F Peptide I Rubiscolins Soymorphins Enkephalinase inhibitors: Amastatin BL-2401 Candoxatril D -Phenylalanine Dexecadotril (retorphan) Ecadotril (sinorphan) Kelatorphan Racecadotril (acetorphan) RB-101 RB-120 RB-3007 Opiorphan Selank Others Semax Spinorphin Thiorphan Tynorphin Ubenimex (bestatin) Propeptides: β-Lipotropin (proendorphin) Prodynorphin Proenkephalin Pronociceptin Proopiomelanocortin (POMC) Others: Kyotorphin (met-enkephalin releaser/degradation stabilizer) v t e Japanese era names (Nengō) Legendary Period Kofun period Asuka period Taika 645–650 · Hakuchi 650–654 · Shuchō 686–686 · Taihō 538–710 701–704 · Keiun 704–708 · Wadō 708–715 Reiki 715–717 · Yōrō 717–724 · Jinki 724–729 · Tenpyō 729–749 Nara period · Kōan 1361–1362 · Jōji 1362–1368 · Ōan 1368–1375 · Eiwa (Northern 1375–1379 · Kōryaku 1379–1381 · Eitoku 1381–1384 · Genchū 1384–1392^‡ Court) 1336–1392 Ōei 1394–1428 · Shōchō 1428–1429 · Eikyō 1429–1441 · Kakitsu 1441–1444 · Bun'an 1444–1449 · Hōtoku 1449–1452 · Kyōtoku 1452–1455 · Kōshō 1455–1457 · Chōroku 1457–1460 · Kanshō Muromachi 1460–1466 · Bunshō 1466–1467 · Ōnin 1467–1469 · Bunmei period 1469–1487 · Chōkyō 1487–1489 · Entoku 1489–1492 · Meiō 1333–1573 1492–1501 · Bunki 1501–1521 · Eishō 1046–1053 · Tengi Heian period 1053–1058 · Kōhei 1058–1065 · Jiryaku 1065–1069 · Enkyū 784–1185 1069–1074 · Jōhō 1074–1077 · Jōryaku 1077–1081 · Eihō 1081–1084 · Ōtoku 1084–1087 · Kanji 1087–1094 · Kahō 1094–1096 · Eichō 1096–1097 · Jōtoku 1097–1099 · Kōwa 1381–1384 · Shitoku Court) 1384–1387 · Kakei 1387–1389 · Kōō 1389–1390 · Meitoku 1390–1394 1336–1392 ^‡ Nanboku-chō Kemmu 1334–1336 · Engen 1336–1340 · Kōkoku 1340–1346 · Shōhei period 1346–1370 · Kentoku 1370–1372 · Bunchū 1372–1375 · Tenju (Southern 1375–1381 · Kōwa 1099–1104 · Chōji 1104–1106 · Kashō 848–851 · Ninju 851–854 · Saikō 854–857 · Ten'an 857–859 · Jōgan 859–877 · Gangyō 877–885 · Ninna 885–889 · Kanpyō 889–898 · Shōtai 898–901 · Engi 901–923 · Enchō 923–931 · Jōhei 931–938 · Tengyō 938–947 · Tenryaku 947–957 · Tentoku 957–961 · Ōwa 961–964 · Kōhō 964–968 · Anna 968–970 · Tenroku 970–973 · Ten'en 973–976 · Jōgen 976–978 · Tengen 978–983 · Eikan 983–985 · Kanna 985–987 · Eien 987–988 · Eiso 988–990 · Shōryaku 990–995 · Chōtoku 995–999 · Chōhō 999–1004 · Kankō 1004–1012 · Chōwa 1012–1017 · Kannin 1017–1021 · Jian 1021–1024 · Manju 1024–1028 · Chōgen 1028–1037 · Chōryaku 1037–1040 · Chōkyū 1040–1044 · Kantoku 1044–1046 · Eishō 1504–1521 · Daiei 1521–1528 · Kyōroku 1528–1532 · Tenbun 1532–1555 · Kōji 1142–1144 · Ten'yō 1144–1145 · Kyūan 1145–1151 · Ninpei 1151–1154 · Kyūju 1154–1156 · Hōgen 1156–1159 · Heiji 1159–1160 · Eiryaku 1160–1161 · Ōhō 1161–1163 · Chōkan 1163–1165 · Eiman 1165–1166 · Nin'an 1166–1169 · Kaō 1169–1171 · Jōan 1171–1175 · Angen 1175–1177 · Jishō 1177–1181 · Yōwa 1181–1182 · Juei 1182–1184 · Genryaku 1184–1185 Bunji 1185–1190 · Kenkyū 1190–1199 · Shōji 1199–1201 · Kennin 1201–1204 · Genkyū 1204–1206 · Ken'ei 1206–1207 · Jōgen 1207–1211 · Kenryaku 1211–1213 · Kempo 1213–1219 · Jōkyū 1219–1222 · Jōō 1652–1655 · Meireki 1655–1658 · Manji 1658–1661 · Kanbun 1661–1673 · Enpō 1673–1681 · Tenna 1681–1684 · Jōkyō 1684–1688 · Genroku 1688–1704 · Hōei 1704–1711 · Shōtoku 1711–1716 · Kyōhō 1716–1736 · Genbun 1736–1741 · Kanpō Edo period 1741–1744 · Enkyō 1308–1311 · Ōchō 1311–1312 · Shōwa 1926–1989 · Heisei