主权项 |
1. A compound comprising the structure: wherein Rx is either H or nothing and when nothing, the adjoining N is negatively charged, and wherein R1, R2, and R3 are each independently H, linear or branched C1-C6 alkyl, oxy, or C1-C6 alkoxy groups, and wherein the nucleic acid is a natural or artificial deoxyribonucleic acid or ribonucleic acid. |