Phenylpropene O-methyltransferase that catalyzes the conversion of trans-anol to trans-anethole and isoeugenol to isomethyleugenol. Phenylpropenes are the primary constituents of various essential plant oils. They are produced as antimicrobial and antianimal compounds, or as floral attractants of pollinators. S-adenosyl-L-methionine + trans-anol = H(+) + S-adenosyl-L-homocysteine + trans-anethole S-adenosyl-L-methionine + trans-isoeugenol = H(+) + S-adenosyl-L-homocysteine + trans-isomethyleugenol Inhibited by zinc and copper. kcat is 0.015 sec(-1) for isoeugenol. Optimum pH is 7.5-8.0. Aromatic compound metabolism; phenylpropanoid biosynthesis. Highly expressed in developing fruits. Expressed at low levels in roots, young leaves, buds and flowers. The phenylpropene trans-anethole imparts the characteristic sweet aroma of anise seeds and leaves. Belongs to the class I-like SAM-binding methyltransferase superfamily. Cation-independent O-methyltransferase family. COMT subfamily.