{"best_oa_location":{"endpoint_id":null,"evidence":"deprecated","host_type":"publisher","is_best":true,"license":null,"oa_date":"1992-05-01","pmh_id":null,"repository_institution":null,"updated":"deprecated","url":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","url_for_landing_page":"https://doi.org/10.1139/v92-162","url_for_pdf":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","version":"publishedVersion"},"data_standard":2,"doi":"10.1139/v92-162","doi_url":"https://doi.org/10.1139/v92-162","first_oa_location":{"endpoint_id":null,"evidence":"deprecated","host_type":"publisher","is_best":true,"license":null,"oa_date":"1992-05-01","pmh_id":null,"repository_institution":null,"updated":"deprecated","url":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","url_for_landing_page":"https://doi.org/10.1139/v92-162","url_for_pdf":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","version":"publishedVersion"},"genre":"journal-article","has_repository_copy":false,"is_oa":true,"is_paratext":false,"journal_is_in_doaj":false,"journal_is_oa":false,"journal_issn_l":"0008-4042","journal_issns":"0008-4042,1480-3291","journal_name":"Canadian Journal of Chemistry","oa_locations":[{"endpoint_id":null,"evidence":"deprecated","host_type":"publisher","is_best":true,"license":null,"oa_date":"1992-05-01","pmh_id":null,"repository_institution":null,"updated":"deprecated","url":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","url_for_landing_page":"https://doi.org/10.1139/v92-162","url_for_pdf":"https://cdnsciencepub.com/doi/pdf/10.1139/v92-162","version":"publishedVersion"}],"oa_locations_embargoed":[],"oa_status":"bronze","published_date":"1992-05-01","publisher":"Canadian Science Publishing","title":"Ecuadorin, a novel tetranortriterpenoid of <i>Guarea</i><i>kunthiana</i>: structure elucidation by 2-D NMR spectroscopy","updated":"2025-09-30T02:39:23Z","year":1992,"z_authors":[{"author_position":"first","is_corresponding":false,"raw_affiliation_strings":[],"raw_author_name":"Baldwin S. Mootoo"},{"author_position":"middle","is_corresponding":false,"raw_affiliation_strings":[],"raw_author_name":"Cumand\u00e1 J\u00e1tiva"},{"author_position":"middle","is_corresponding":false,"raw_affiliation_strings":[],"raw_author_name":"Winston F. Tinto"},{"author_position":"middle","is_corresponding":false,"raw_affiliation_strings":[],"raw_author_name":"William F. Reynolds"},{"author_position":"last","is_corresponding":false,"raw_affiliation_strings":[],"raw_author_name":"Stewart McLean"}]}