Reference

Effect of dihydroxyprogesterone and estradiol on laying hens

Effect of dihydroxyprogesterone and estradiol on laying hens. Melgar Arnaiz, F. (Fac. Vet., CSIC, Madrid, Spain). An. Inst. Invest. Vet., Madrid, Volume Date 1976-1977, 24, 39-44 (Spanish) 1977. CODEN: AIVMAT. ISSN: 0365-3536. DOCUMENT TYPE: Journal CA Section: 2 (Hormone Pharmacology) Injection of 25, 50, and 100 mg of a mixt. contg. dihydroxyprogesterone acetopheride (I) [1179-87-9] and estradiol enanthate (II) [4956-37-0] at a wt. ratio of into hens completely interrupted egg-laying within 48 h. Recovery was obsd. in ~80% of the birds in 50, 57, and 62 days after the 25, 50, and 100 mg doses, resp.

Thermoanalytical and IR spectroscopic studies on several crystal forms of estradiol and androstane type drugs

Thermoanalytical and IR spectroscopic studies on several crystal forms of estradiol and androstane type drugs.Some chemicals with cas registry numbers like 61756-87-4 and 1852-53-5 are also used. Part 2. Kuhnert-Brandstaetter, M.; Winkler, H. (Inst. Pharmakog., Univ. Innsbruck, Innsbruck, Austria). Sci. Pharm., 44(3), 191-205 (German) 1976. CODEN: SCPHA4. DOCUMENT TYPE: Journal CA Section: 63 (Pharmaceuticals) Section cross-reference(s): 75 The steroid hormones estradiol cypionate (I) [313-06-4], estradiol enanthate [4956-37-0], ethynylestradiol [57-63-6], mestranol [72-33-3], estrone acetate [901-93-9], and 5.alpha.-androstan-3.alpha..17.beta.-diol (II) [1852-53-5] were tested for polymorphism and pseudopolymorphism. Estradiol enanthate and estrone acetate formed only polymorphic forms, ethynylestradiol formed only solvates, and I, mestranol and II had both solvates and polymorphic forms. Enantiotropic .alpha.-.beta. conversion was obsd. for I and II. Ethynylestradiol is one of the steroid hormones for which the hydrate is so much the preferred cryst. form that it crystallizes out of solns. of the compd. in many anhyd. org. solvents. Two different polymorphic modifications were obsd. in com. estrone acetate. IR spectra are given for most of the polymorphic and pseudopolymorphic forms. .