(-)-sanglifehrin A

(2S,3R,4S,5S,6R,9S,11S)-9-Ethyl-4-hydroxy-2-[(2S,3S)-2-hydroxy-3-methyl-6-(1-phenyl-1H-tetrazol-5-ylsulfanyl)-hexyl]-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(2S,3S,4S,5S,6R,9S,11S)-9-Ethyl-3,5,11-trimethyl-2-[(2S,3S)-3-methyl-6-(1-phenyl-1H-tetrazol-5-ylsulfanyl)-2-triethylsilanyloxy-hexyl]-4-triethylsilanyloxy-1-oxa-7-aza-spiro[5.5]undecan-8-one