1,2-Naphthoquinone 2-semicarbazone 15687-37-3 2-Semicarbazono-1(2H)-naphthalinon EINECS 239-785-1 Karbinone Mediaven Mediavene Naftazona [INN-Spanish] Naftazone Naftazone [BAN:DCF:INN] Naftazonum [INN-Latin]