| http://www.w3.org/ns/prov#value | - It has surprisingly been discovered that the reaction of SMPB with a nucleophilic liposome forming lipid, for example, PE, utilizing the prior art methodology (conditions which employ methanol, ethanol or other alcohol as solvent under basic conditions) results in the production of a reactive lipid, for example, MPB-PE, plus a substantial amount of a side product in which the maleimide ring is ope
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