11-Ketodihydrotestosterone is a metabolite of 11β-Hydroxyandrostenedione. It is an active androgen and is also a potent androgen receptor (AR) agonist (Ki: 20.4 nM, EC50: 1.35 nM for human AR).
Neoaureothin is a bacterial metabolite that has been found in Streptomyces. It is an androgen receptor (AR) antagonist that inhibits binding of dihydrotestosterone (DHT) to ARs (IC50 = 13 μM) and inhibits DHT-induced expression of prostate-specific antigen in LNCaP cells (IC50 = 1.75 nM). Neoaureothin is cytotoxic to A549, HCT116, and HepG2 cells (IC50s = 34.3, 47, and 37.2 μg ml, respectively). It also has nematocidal activity against the pine wood nematode B. xylophilus (LC50 = 0.84 μg ml) and increases survival of P. densiflora trees inoculated with B. xylophilus.
17,17-(Ethylenedioxy)androst-4-en-3-one (4- androstene- 3, 17- dione- 17- cyclic ethylene ketal) is an effective ingredient in cosmetics, which can be used for acne and promote hair growth research. 17,17-(Ethylenedioxy)androst-4-en-3-one can inhibit the reductase activity and inhibit the bond of a receptor protein and 5α-DHT.
Tebuconazole-d9 is intended for use as an internal standard for the quantification of tebuconazole by GC- or LC-MS. Tebuconazole is a triazole fungicide that is active against both seed and foliar fungi. It inhibits 14α-demethylase isolated from U. maydis and S. bicolor with IC50 values of 0.05 and 0.16 nM, respectively. It inhibits the androgenic effect of the androgen receptor agonist DHT (IC20 = 2.89 µM) and is cytotoxic (EC20 = 38.9 µM) in an MDA-kb2 assay. Tebuconazole (50 and 100 mg kg per day) administered during gestation reduces testosterone levels and increases testicular levels of progesterone and 17α-hydroxyprogesterone in male rat fetuses. It has a feminizing effect on male pups and a virializing effect on female pups. When administered to rats gestationally through postnatal day 42, tebuconazole (20 and 60 mg kg per day) leads to cell death of pyramidal cells in the CA3-4 region of the hippocampus and layer V of the cortex concomitant with impairment in learning......