Absolutely yes.  Charcoal chromatography was, in the past, used extensively for the separation and purification of carbohydrates. For example, a series of maltodextrins arising from starch hydrolysis can be separated by charcoal chromatography, using an ethanol-water gradient. The NMR peaks you see at 4.5 - 3.0 ppM could very well be due to carbohydrates. If you have a sugar that crystallizes readily, one possibility might be sucrose, which is commonly found in plants. Raffinose is another possibility; there are many others, as well.

Hallo Skumar

Activated carbon, also called activated charcoal, is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions

https://en.wikipedia.org/wiki/Activated_carbon

Thank you Mr. Cote and Mr. Gadallah. Now it fits. All the results point to sugars. 

But there are reports where activated carbons are used to separate phenolic compounds from molasses or other feedstocks for bioreactors, which have higher contents of sugar. 

How does activated carbons work in case of sugar adsorption?

Although sugars are very hydrophilic, with all of those hydroxyl groups sticking out into the medium, they do have a slightly hydrophobic nature as well, where the C-H groups of the ring are exposed. Depending on the configuration and conformation of the sugar, this hydrophobic surface of the molecule can bind to activated carbon. It is not as strong an interaction as phenolics, so you should be able to remove highly colored aromatic compounds from carbohydrates in this way, as well as separating various sugars one from another.

Thank you Mr. Cote.