Fenspiride [INN]; Fenspiride; BRN 0533332; Fenspirida; Fenspirida [INN-Spanish]; Fenspiridum; Fenspiridum [INN-Latin]; Respiride; UNII-S983QC7HKM; Viarespan; 1-Oxa-3,8-diazaspiro(4,5)decan-2-one, 8-(2-phenylethyl)-; 8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one