Carbamicacid, [1,4-phenylenebis(methylene)]bis-,bis[2-[5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3-[2-[4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3-methoxycyclohexyl]-1-methylethenyl]-1,4,5,6,7,8,11,12,13,14,15,16,17,18,19,20,21,23,24,25,26,26a-docosahydro-19-hydroxy-14,16-dimethoxy-4,10,12,18-tetramethyl-1,7,20,21-tetraoxo-15,19-epoxy-3H-pyrido[2,1-c][1,4]oxaazacyclotricosin-8-yl]ethyl]ester, stereoisomer; 15,19-Epoxy-3H-pyrido[2,1-c][1,4]oxaazacyclotricosine,carbamic acid deriv.; FK 1012; FK 1012A