3,3,5-trimethyl-2H-1,4-oxazin-6-one

syn-4-chloro-2,3-dihydroxy-1,2-diphenylbutan-1-one

syn-2,3-dihydroxy-1,2-diphenyl-4-methylpentan-1-one

1,2,3,4-四苯基-1,4-丁烷二酮

syn-2,3-dihydroxy-1,2,4-triphenylbutan-1-one