question: Which Species Specific has a Comparative of no, and an Intra-molecular structure of no, and a Link of sourcecode?
answer: SELECT species_specific FROM table_name_29 WHERE comparative = "no" AND intra_molecular_structure = "no" AND link = "sourcecode"
context: CREATE TABLE table_name_29 (species_specific VARCHAR, link VARCHAR, comparative VARCHAR, intra_molecular_structure VARCHAR)