... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > alkaloid > isoquinoline alkaloid > morphinane alkaloid > butorphanol D-tartrate

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > alkaloid > isoquinoline alkaloid > morphinane alkaloid > butorphanol D-tartrate

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > salt > organic salt > tartrate salt > butorphanol D-tartrate