这是CrossFire化学信息系统的网站。它是MDL Information Systems公司的信息产品，数据季度更新，收集了200多年的基础文献数据，它包括两个子数据库：CrossFire Gmelin和CrossFire Beilstein，由9百万种无机、有机和有机金属化合物信息组成。CrossFire Gmelin是金属有机和无机化学领域收录数据最广泛的数据库，收录了1772年以来文献记录中的8.5百万个化合物、130万个结构和130万个反应，以及90万篇1995年以来包括标题和文摘的文献引文。CrossFire Beilstein是世界上最大的关于有机化学事实的数据库，数据来源于175种期刊，已收录8百万个化合物和9百万个反应。检索须注册。

This is the website of CrossFire Chemical Information System. CrossFire Chemical Information System is a product of MDL Information Systems, Inc. and a complete in-house chemical information solution, covering over 200 years of primary literature. The two databases, Beilstein (organic) and Gmelin (inorganic), collectively comprise more than 9 million organic, inorganic and organometallic compounds. CrossFire Beilstein contains over 8.5 million compounds, 9 million chemical reaction references, 35 million associated chemical and physical property records, and over 1 million abstracts and titles indexed since 1980. CrossFire Gmelin contains more than 800 different chemical and physical data fields for over 1.8 million compounds, with 1.3 million reactions and 900,000 citations including titles and abstracts from 1995. In order to use CrossFire, you must first register.