Aloe is really great for cuttings and seedlings - Salicylic Acid, IAA, etc.
The ten main areas of chemical constituents of Aloe vera include: Amino Acids, Anthraquinones, Enzymes, Minerals, Vitamins, Lignins, Monosaccharide, Polysaccharides, Salicylic Acid, Saponins, And Sterols.
Amino acids...