3-methyl-5-methylsulfonyl-1-(2,2,4-trimethyl-3,4-dihydro-1H-quinolin-8-yl)pent-4-en-1-one;3-methyl-5-methylsulfonyl-1-(2,2,4-trimethyl-1H-quinolin-8-yl)pent-4-en-1-one;5-methylsulfonyl-1-(2,2,4-trimethyl-3,4-dihydro-1H-quinolin-8-yl)pent-4-en-1-one;5-methylsulfonyl-1-(2,2,4-trimethyl-1H-quinolin-8-yl)pent-4-en-1-one