14966
These reactions proceeded stereo - specifically affording a single isomer of the 16 - spiro steroids in excellent yields .
 Chemical: 16 - spiro steroids
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 16 - spiro steroids 
Answer:
 Chemical: 16 - spiro steroids