[0046] The invention provides an antiplaque oral composition that includes an orally acceptable carrier；and an antibacterially effective amount of a compound of structureIn the structure, R1and R2are independently selected from a lower C1－4alkyl group and R3and R4are independently an alkenyl or alkyl group having from 1 to 20 carbon atoms.[0047] Also included in the invention are toothpastes or tooth gels that include at least one humectant；at least one abrasive compound；and an antibacterially effective amount of the compound represented by the structure of formula (I). Also provided are methods of inhibiting bacterial growth in the oral cavity of an animal by application of the compound of formula (I).[0046]本發明提供一種抗牙斑之口腔組成物，其包括一種口腔可接受之載劑；和一種抗菌有效量之結構(I)的化合物：於結構中，R1及R2獨立地選自低級C1－4烷基，且R3及R4獨立地為一具有1至20個碳原子之烯基或烷基。[0047]亦被包括於本發明中者為牙膏或牙凝膠，其包括至少一種濕潤劑；至少一種研磨化合物；及一種抗菌有效量之由式(I)結構所代表之化合物。亦提供藉塗覆式(I)之化合物來抑制動物口腔中細菌生長之方法。
