Alkaloid is an important part of the secondary metabolites obtained in natural,widely distributed in nature, including various plants, animals (such as the Africanfrog), marine organisms, cyanobacteria, mushrooms, and even the human blood andtissues (including the human brain, cerebrospinal fluid, platelet, milk, urine, liver,kidney and lens). Marine natural products is an important source of compoundshaving anti-tumor activity, and β-carboline alkaloids are a large group of natural andsynthetic indole alka...