NC61660
(2R,4R,5S,17R,18S,20R,27R)-18-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-4-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-27-methyl-23,29-bis[[2-(trimethylsilyl)ethoxy]methyl]-3,6,15,33-tetraoxa-1,21,23,29-tetraazapentacyclo[25.3.1.12,5.117,20.121,25]tetratriaconta-10,25(32)-diene-7,14,22,24,28,30-hex...