Basil is Ocimum basilicum or O. tenuiflorum (holy basil / tulsi). The marker is methyl chavicol or eugenol. Estragole is a cosmetic-safety conversation, not a flavour upgrade. Chemotype can drift with cut and still. Putting both species on one URL is honest about what India distills. It is not permission to share a drum.
Eucalyptus is E. globulus (1,8-cineole) or E. citriodora (citronellal). Rectification raises cineole. It does not turn citriodora into a cineole monograph. If you needed citronella, that is another SKU.
Write the Latin name and the marker on the purchase order. The “or” on the page is the spec.