Amygdalin, nitrilosida, natural chemical compound ( there is also another semi-synthetic ) present in the seeds of fruits such as peach, apricot, Apple, watermelon and especially bitter almonds. They have also named it vitamin 17, although strictly it is not. It is a Glycoside containing glucose, benzaldehyde, and cyanide, which was in the middle of the last century that it could be a remedy against cancer, that the subsequent investigation has denied.