NOVELTY - A Magnolia officinalis phenol/azo magnolol and nitration M. officinalis phenol derivative is new.    USE - A Magnolia officinalis phenol/azo magnolol and nitration M. officinalis phenol derivative for preparation of plant source pesticide (claimed).    ADVANTAGE - Preparation process has high efficiency and is environment-friendly, and pesticide has low toxicity.    DETAILED DESCRIPTION - A Magnolia officinalis phenol/azo magnolol and nitration M. officinalis phenol derivative of compound of formula (I) is new.    R3=4'-OH or 2'-OH;    R1=N=N-Ph, N=N-(4-CH3)-Ph, N=N-(3-CH3)-Ph, N=N-(2-CH3)-Ph, N=N-(2-OCH3)-Ph, N=N-(2-OC2H5)-Ph, N=N-(2-Cl)-Ph, N=N-(4-Cl)-Ph, N=N-(4-NO2)-Ph, N=N-(2-NO2)-Ph, N=N-(4-Br)-Ph, N=N-(3-CF3)-Ph, N=N-(4-COOC2H5)-Ph, N=N-(3-CF3,5-CF3)-Ph, N=N-(2-F3,4-CH3)-Ph, N=N-(2-CH3,3-Cl)-Ph, N=N-naphtahelene ring ( alpha ), N=N-(2-CH3,3-F)-Ph, or N=N-(2-CH3,3-F)-Ph when R3 is 4'-OH, N=N-Ph, N=N-(4-CH3)-Ph, N=N-Ph, N=N-(2-OCH3)-Ph, N=N-Ph, N=N-(2-OC2H5)-Ph, N=N-(2-Cl)-Ph, N=N-(4-NO2)-Ph, N=N-(3-CF3)-Ph, N=N-(3-CF3,5-CF3)-Ph, or N=N-(2-CH3,3-Cl)-Ph, N=N-(2-CH3,3-F)-Ph when R3 is 2'-OH and R1 is the same as R2, H when R3 is 2'-OH, or NO2 when R3 is 2'-OH and R1 is the same as R2; and    R2=N=N-Ph, N=N-(4-CH3)-Ph, N=N-(3-CH3)-Ph, N=N-(2-CH3)-Ph, N=N-(2-OCH3)-Ph, N=N-(2-OC2H5)-Ph, N=N-(2-Cl)-Ph, N=N-(4-Cl)-Ph, N=N-(4-NO2)-Ph, N=N-(2-NO2)-Ph, N=N-(4-Br)-Ph, N=N-(3-CF3)-Ph, N=N-(4-COOC2H5)-Ph, N=N-(3-CF3,5-CF3)-Ph, N=N-(2-F3,4-CH3)-Ph, N=N-(2-CH3,3-Cl)-Ph, N=N-naphtahelene ring ( alpha ), N=N-(2-CH3,3-F)-Ph, or N=N-(2-CH3,3-F)-Ph when R3 is 4'-OH, N=N-Ph, N=N-(4-CH3)-Ph, N=N-Ph, N=N-(2-OCH3)-Ph, N=N-Ph, N=N-(2-OC2H5)-Ph, N=N-(2-Cl)-Ph, N=N-(4-NO2)-Ph, N=N-(3-CF3)-Ph, N=N-(3-CF3,5-CF3)-Ph, or N=N-(2-CH3,3-Cl)-Ph, N=N-(2-CH3,3-F)-Ph when R3 is 2'-OH and R2 is the same as R1, N=N-Ph, N=N-(4-CH3)-Ph, N=N-(2-OCH3)-Ph, N=N-(2-OC2H5)-Ph, N=N-(4-NO2)-Ph, N=N-(3-CF3,5-CF3)-Ph, N=N-(2-CH3,3-Cl)-Ph, or N=N-(2-CH3,3-F)-Ph provided when R1 is H and R3 is 2'-OH, or NO2 when R3 is 2'-OH and R1 is the same as R2.    An INDEPENDENT CLAIM is included for Magnolia officinalis phenol/azo magnolol and nitration M. officinalis phenol derivative of compound of formula (I).