2H/13C-labeled standards

androstenone
5α‐androst‐16‐en‐3‐one

d3-androstenone
[5,6,7‐2H3]‐5α‐androst‐16‐en‐3‐one

3β-androstenol
3β‐hydroxy‐5α‐androst‐16‐en

d3-3β-androstenol
[5,6,7‐2H3]‐3β‐hydroxy‐5α‐androst‐16‐en

THI
2-acetyl-4(5)-(1R,2S,3R,4-tetrahydroxybutyl)imidazole

[13C6]-THI
[13C6]-2-acetyl-4(5)-(1R,2S,3R,4-tetrahydroxybutyl)imidazole

CMF
5-chloromethylfurfural

[13C6]-CMF
[13C6]-5-chloromethylfurfural

[2H3]-skatole

[2H6]-indole