Chemically-defined non-polymeric valency platform molecules and conjugates thereof

A chemically-defined, non-polymeric valency platform molecule of the formula:

• ##STR13## wherein G.sup.[7] is --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --;
• Q.sup.[7] is --CH.sub.2 CH.sub.2 --NH--C(.dbd.O)--(CH.sub.2).sub.5 --NH--C(.dbd.O)--;
• each of the (p.sup.[7] x n.sup.[7]) moieties shown as T.sup.[7] is R.sup.ALK X;
• each X is independently a halogen of atomic number greater than 16 and less than 54 or other good leaving group;
• each R.sup.ALK is independently a linear, branched, or cyclic alkyl (1-20C) group;
• n.sup.[7] =2;
• and
• p.sup.[7] =2.