136765-20-3 4a,7:14a,17:26a,29:36a,39-Tetrametheno-6H,16H,28H,38H-tetrabenzo[b,j,t,b1][1,9,19,27]tetraoxacyclohexatriacontin-12-carboxaldehyde, 2,24-bis[(.alpha.-D-galactopyranosyloxy)methyl]-3,4,8,10a,13,14,18,22a,25,26,30,32a,35,36,40,44a-hexadecahydro-45,46,47,48-tetrahydroxy-34-(hydroxymethyl)-3,10a,13,19,22a,25,32a,35,41,44a-decamethyl-6,8,16,18,28,30,38,40-octaoxo- AIDS-087157 AIDS087157 BU-3889V A2 Quartromicin A2