Perfume system for perfumed consumer product

A perfume system comprising:

• a) a core-shell microcapsule A,
• b) optionally, a core-shell microcapsule B, and
• c) optionally, a free perfume oil,
• wherein the core of the core-shell microcapsule A and/or the free perfume oil comprises a 2-oxoacetate derivative of formula (I)
• wherein
• R1 represents a linear or branched C1 to C22 alkyl or alkenyl group, optionally containing one to four oxygen atoms that are not directly connected to the carbonyl group, or a cyclic C3 to C8 alkyl or alkenyl group, optionally containing one to four oxygen atoms that are not directly connected to the carbonyl group, or a phenyl group, optionally substituted with a C1 to C4 alkyl groups;
• R2 represents a linear, branched or cyclic C1 to C22 hydrocarbon group, optionally containing one to four oxygen atoms and
• R3 represents a hydrogen atom or a C1 to C10 hydrocarbon group, optionally containing one to two oxygen atoms;
• or R2 and R3, when taken together, form a C5-16 cycloalkyl, C5-16 cycloalkenyl, C4-14 heterocycloalkyl or C4-14 heterocycloalkenyl group;
• wherein the core of the core-shell microcapsule A, the core of the core-shell microcapsule B, or free perfume oil comprises a perfumery raw material of Group B,
• wherein the perfumery raw material of Group B is selected from the group consisting of benzo[d][1,3]dioxole-5-carbaldehyde, (E)-1-(benzyloxy)-2-methoxy-4-(prop-1-en-1-yl)benzene, 2H-chromen-2-one, 1,2-dimethoxy-4-[(1E)-1-propen-1-yl]benzene, 1,5-dimethyl-1-vinyl-4-hexenyl (E)-3-phenylpropenoate, (E)-2-hexyl-3-phenyl-2-propenal, 4-(4-hydroxy-3-methoxyphenyl)-2-butanone, 2-isobutylquinoline, 2-methoxynaphthalene, 2-methoxy-4-(2-propen-1-yl) phenol, 2-methoxy-4-[(1E)-1-propen-1-yl]phenol, 2-methoxy-4-propylphenol, methyl 2-aminobenzoate, methyl N-[3-(4-tert-butylphenyl)-2-methyl-1-propenyl]anthranilate, methyl 2-(methylamino)benzoate, 6-methyl-1,2,3,4-tetrahydroquinoline, 1-(naphthalen-2-yl) ethan-1-one, (E)-2-pentyl-3-phenyl-2-propenal, (Z)-2-phenyl-2-hexenenitrile, (E)-3-phenyl-2-propen-1-ol, (2E)-1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one and (3E)-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-buten-2-one.