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D04 Polycyclic Hydrocarbons D011083 +
D04.808 Steroids D013256 +
D04.808.745 Pregnanes D011278 +
D04.808.745.745 Pregnenes D011283 +
D04.808.745.745.654 Pregnenediones D011282 +
D04.808.745.745.654.829 Progesterone D011374 +
D04.808.745.745.654.829.395 Hydroxyprogesterones D006908 +
D04.808.745.745.654.829.395.400 17-alpha-Hydroxyprogesterone D019326
D06 Hormones, Hormone Substitutes, and Hormone Antagonists D006730 +
D06.472 Hormones D006728 +
D06.472.334 Gonadal Hormones D042341 +
D06.472.334.851 Gonadal Steroid Hormones D012739 +
D06.472.334.851.687 Progesterone Congeners D045167 +
D06.472.334.851.687.750 Progesterone D011374 +
D06.472.334.851.687.750.478 Hydroxyprogesterones D006908 +
D06.472.334.851.687.750.478.400 17-alpha-Hydroxyprogesterone D019326