What are the ingredients? What percent rucinol does it contain?

Hi, Noreva Iklen + Melano-expert has been renewed and now they use 4-butylresorcinol instead Rucinol. You can see more about 4-butylresorcinol here: https://www.ncbi.nlm.nih.gov/pubmed/23205541 Noreva Iklen + Melano-expert anti-brown spot 15ml exp. date - 6/2022 Product presentation This product targets localized hyperpigmentation. Using prolonged – release 4-butylresorcinol, it reduces existing dark spots and prevents new ones developing. Vitamin C helps stimulate the synthesis of the skin’s support fibres for anti-ageing and anti-dark spot action. Results: Skin looks radiant and more even toned, the size and intensity of dark spots are visibly reduced. Directions for Use Apply morning and/or night on the affected areas (face, hands, chest) Ingredients AQUA (WATER), CYCLOPENTASILOXANE, SILICA, DIMETHICONE, BUTYLENE GLICOL, PEG-10 DIMETHICONE, DIMETHICONE/VINYL DIMETHICONE CROSSPOLYMER, DISTEARDIMONIUM HECTORITE, CETYL ETHYLHEXONOATE, PHENYL TRIMETHICONE, PEG-32, PEG-6, 4-BUTYLRESORCINOL, METHYLPARABEN, ASCORBYL GLUCOSIDE, SODIUM CITRATE, ALCOHOL, CLYCINE SOJA (SOYBEAN) OIL, POTASSIUM HYDROXIDE, CITRIC ACID, ACHILLEA MILLEFOLIUM EXTRACT, SOPHORA ANGUSTIFOLIA ROOT EXTRACT, DAUCUS CAROTA SATIVA (CARROT) ROOT EXTRACT, TOCOPHEROL