Abstract: The invention relates to nanotubes and processes for making them and intermediates of a drug moiety or its derivative/s as a structural moiety with side chain/s capable of promoting self aggregation. The side chain/s are mono or a multiple of alkyl chain/s that are substituted or unsubstituted capable of creating self aggregating assemblies. A p-amino benzoic acid (PABA) moiety or derivative as a structural moiety of 4-alkylamido-N-pyridin-2yl-benzamide with a lauric or stearic side chain. 4-alkylamido-N-pyridin-2yl-benzamide and 4-Amino-N-pyridine-2 yl-benzamide, N-(Pyridine-2-yl)-4-dodecanamido-benzamide and N-(Pyridin-2-yl)-4-stearamidobenzamide are intermediates useful for in vivo Conjugation of an active ingredient, illustrated by Rhodamine B. With Rhodamine B as an active ingredient, nano-tubes prepared with lauric side chain, which show red fluorescence and is useful for in vivo tracking.