Steroidal alkaloids structure

Most of the known functions of alkaloids are related to protection. For example, aporphine alkaloid liriodenine produced by the tulip tree protects it from parasitic mushrooms. In addition, the presence of alkaloids in the plant prevents insects and chordate animals from eating it. However, some animals are adapted to alkaloids and even use them in their own metabolism. [193] Such alkaloid-related substances as serotonin , dopamine and histamine are important neurotransmitters in animals. Alkaloids are also known to regulate plant growth. [194] Another example of an organism that uses alkaloids for protection is the Utetheisa ornatrix , more commonly known as the ornate moth. Pyrrolizidine alkaloids render these larvae and adult moths unpalatable to many of their natural enemies like coccinelid beetles, green lacewings, insectivorous hemiptera and insectivorous bats. [195]

Steroidal alkaloids structure

steroidal alkaloids structure

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