buildings for fermentative, sugar and starch processing, tannery chemicals and pharmaceutical industries. The first course on organic chemistry applied to pharmacy was taught initially by Adolfo P. Castañares, who was, after some years, elected as director of the school. The degree in chemical engineering was later implemented in 1925 by the pioneering engineer Estanislao Ramírez. He studied in the Massachusetts Institute of Technology, where he learned unit operations from their creator, William H. Walker. Estanislao Ramírez was professor of industrial physics since 1922, and 19 years after creating the degree in chemical engineering in the National University of Mexico, he was also founder of the degree of industrial chemical engineering in the National Polytechnic Institute (IPN), in 1944. In 1965, the National School of Chemical Sciences was awarded the rank of "Faculty", meaning it now had graduate school programs. Noted faculty and alumni Mario J. Molina, Nobel laureate in Chemistry in 1995. Luis E. Miramontes, co-inventor of the first oral contraceptives. Francisco Gonzalo Bolívar Zapata, Prince of Asturias awardee in 1991, developed molecular biology-based techniques used to produce insulin and somatostatin. Jesús Romo Armería, National Prize for Arts and Sciences in 1971, synthetic chemist who first developed an economical method to synthesize the feminine hormones estradiol and progesterone from dioscoreas. Alfonso Romo de Vivar, developed an economical technique to obtain steroids using natural products from vegetal resources such as Yucca filifera. Benito Bucay Faradji, professor, financier and mathematician. Roberto Medellín, academic, dean of UNAM and director of the IPN in the decade of 1930. Facilities The School of Chemistry consists of the following buildings: Complexes A, B, C and F, in the main area of Ciudad Universitaria campus. Complexes D and E, in the south sector of Ciudad Universitaria. External Complex of Tacuba, it is placed where the original building of the National School of Chemical Sciences was first established. It is located in Tacuba, in the borough of San Álvaro, north-west Mexico City. Sisal Foreign Station, in Sisal, Mérida, Yucatán (south-east Mexico). Former Directors Juan Salvador Agraz (1916–1918) Adolfo P. Castañares (1918–1919) Francisco Lisci (1919–1920), (1933–1934) Roberto Medellín (1920–1921), (1929–1931) Julián Sierra (1921–1924) Ricardo Caturegli Fontes (1924–1927), (1944 interino) Juan Manuel Noriega (1927–1929) Rafael Illiescas Fribie (1931–1933), (1947–1956) Fernando Orozco Díaz (1934–1941) Manuel Dondé Gorozpe (1941–1944) Eugenio Álvarez (1944–1947) Francisco Díaz Lombardo (1956–1964) Manuel Madrazo Garamendi (1964–1970) José F. Herrán Arellano (1970–1978) Armando Xavier Padilla Olivares (1978–1986) Francisco José