Complex sentence: It is believed that isopropyl cyanide has been probably essential for the creation of primary life and, therefore, this discovery suggests that the complex molecules needed for life may have their origins in interstellar space.
Split into simpler sentences: It is believed that isopropyl cyanide has been probably essential for the creation of primary life. So that, this discovery suggests that the complex molecules needed for life may have their origins in interstellar space.