The invention provides analogues of (S)-germacrene D analogue which have improved insect repellent properties compared to (S)-germacrene D analogue or which have insect attractant properties.

The present disclosure discloses a germacrene synthase SgTPS7 protein, a coding gene and a use in synthesizing germacrene, relating to the technical field of germacrene synthesis of Sindora glabra Merr. ex de Wit. The present disclosure isolates a gene of germacrene synthase D from the genome of Sindora glabra Mer. ex de Wit. The gene encodes the protein germacrene synthase D which can catalyze the production of germacrene and can be used for the production and application of germacrene.

The present disclosure discloses a germacrene synthase SgTPS7 protein, a coding gene and a use in synthesizing germacrene, relating to the technical field of germacrene synthesis of Sindora glabra Merr. ex de Wit. The present disclosure isolates a gene of germacrene synthase D from the genome of Sindora glabra Mer. ex de Wit. The gene encodes the protein germacrene synthase D which can catalyze the production of germacrene and can be used for the production and application of germacrene.