Description of the Invention The leaf gel filet was care fully obtained using a kitchen knife from a whole leaf an adult aloe vera barbadensis Mill. , which was commercially obtained. This Gel was immediately homogenized with a common kitchen mixer, it was then centrifuged at 4 degrees Celsius by 10000 * g (gravitational constant), the supernatant was then immediately introduced in a simple commercially available cellulose ester dialysis membrane tubes with a molecular cut of weight (MCOW) between 6000-7000 Da. (the size of the tubes used were adapted to the quantity of matrial used) Dialyses was then carried out for 48 hours at 8 degrees Celsius against"aqua distillata" (distillated water). The external water phase and not the water phase in the tube! was then collected an immediately frozen with liquid nitrogen or in a freezer at minus 30 degrees Celsius. This ice mass containing Veracylglucan A, B and C was properly freeze dried (lyophilized) this resulted to a very hygroscopic and low density mixture of the three compounds. These compounds were then immediately separated with absolutely water free methanol 30 minutes under stirring and another 30 minutes was used for sedimentation in the system at 8 degrees Celsius, Veracylglucan A and B are very soluble in methanol while Veracylglucan C is totally insoluble in methanol under these conditions the methanol phase (supernatant) was then separated from the insoluble counterpart. The methanol solution was then immidiately treated to obtain the compounds by use of a rotary evaporator at 27 degrees Celsius and pressure 5 m Bar. The methanol insoluble Veracylglucan C was kept in the main time in the refrigerator at 8 degrees Celsius. After completely evaporating methanol, the three compounds were then dissolved separately (A and B making on fraction) in distillated water (prior to biological testing the three compounds were exhaustively-3 times 9 hours-dialyzed against distilled water at 8 degrees Celsius using tube membranes with MCOW= 100 Da for A and B and MCOW=1000 Da. in other to get rid of rests of methanol, A and B respectively) and immediately freeze dried. The dialysis was carried out all along in a ratio of 10 probe solution units in the Tubes to 90 external distillated water phase units.

The lyophilize compounds were then ready for Chemical analysis, a fraction was also lyophilized containing all three compounds. The mixture of compound were first analyzed using a gradient RP-18-HPLC-PDA Method with following parameters; acetonitrile /water (distilled) 100-70% (starting with acetonitril at 100 %), flow rate 0,5 ml/Min. at room temperature. These analysis gave the first indications that the mixture contained thre compounds. After one and two dimensional (for Veracylglucan C partial hydrolysis was carried out to solve structure elucidation problems) NMR analysis (experiments used; 1H, 13C, APT, 1H-1H-COSY, HMBC and HMQC) and mass spectrometry with ESI-MS for all three compounds and MALDI-TOF-MS only for Veracylglucan C. With these data clear chemical structures of the compounds could be produced. This the led to the application of capillary electrophoresis which became quite useful to complete this work. The analysis was carried out with a borate buffer at PH 10.5 for seven minutes this gave rise to three good peaks which could be determined with the PDA detector and distinct UV-spectra of the three compounds were then obtained during this process.

For the investigation of the biological activities the works were carried out with concentrations of 10,6, 4, and 2% relative to rest of the test media. The compounds were only removed from their storage at minus 30 degrees Celsius just a couple of minutes before thier introduction to the respective test systems.