Methyl cis-13,16-docosadienoate, 10mg/ml in Heptane, 1ml

Sulfamethoxazole, 1000µg/ml in MeOH, 1ml

Caffeine

2,2',4,5,5'-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane