Similarity is based on note and accord overlap, not molecular analysis.
The main accords of Oranges and Lemons Say The Bells of St Clements are citrus and aromatic. It opens with Lemon and Bergamot, reveals Neroli and Petitgrain at its heart, and dries down to Vetiver and Ylang-Ylang. People reach for it in summer, mostly by day.
How a perfume unfolds →