(1) Organic texts often cite flavor chemicals such as vanillin from vanilla as examples of naturally occurring organic chemicals that we encounter every day.(2) The best pods are dark brown or black, rather wrinkled and flexible, with a light coating of white crystals of aromatic vanillin .(3) The compound responsible for this distinctive, complex perfume is vanillin , contained in thousands of pinpoint seeds in the seed pods of a particular orchid plant.(4) After this time the surface of the fruit will be covered in crystals of glucose and vanillin and the fruits themselves have become black from oxidization but are still flexible.(5) Medieval linens show the presence of vanillin in chemical tests, but the linen in the Dead Sea scrolls and other very old linens do not.
