6633-21-2 1-{[(4R,7S,10S,16S,19R)-19-AMINO-7-(2-AMINO-2-OXOETHYL)-10-(3-AMINO-3-OXOPROPYL)-13-[(2S)-BUTAN-2-YL]-16-(3,4-DIHYDROXYBENZYL)-6,9,12,15,18-PENTAOXO-1,2-DITHIA-5,8,11,14,17-PENTAAZACYCLOICOSAN-4-YL]CARBONYL}PROLYL-L-LEUCYLGLYCINAMIDE 65904-12-3 1,3,7,9-tetratert-butyl-2,2,8,8-tetramethyl-5,10-dithia-1,3,7,9-tetraza-2,8-disila-4,6-distannadispiro[3.1.36.14]decane